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10800

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Blog Entries posted by 10800

  1. 10800
    I hope Mark won't mind me posting these, but I didn't even know he was doing this!
     
    Footbridge stairs by 3D printing, as part of the whole structure - photos speak for themselves really, amazing.
     

     

     

     

     

  2. 10800
    After the 'great lift' it was time to start fixing some of the balustrades, refuges and pavilions back onto the viaduct deck.
     
    Here are some shots from today of the two boards that we will be showing, about 40% of the total. Lengths of 7mm wide stripwood were temporarily glued with Copydex along the edge of the deck to allow the balustrades to be set at the right distance in from the edge; a simple jig was then used to set them in the right place with respect to the refuge outriggers. The refuges were then added after the alignment strip was removed.
     
    The end balustrades and pavilions are just Copydexed for the time being because the pavilions may need to be removed for final painting.
     
    The buttresses supporting the pavilions have also been extended outwards from their original too shallow construction.
     

     

     

     

     

     

     

     
    Quite a bit needs to be done in the next three weeks on further detailing and scenics - we should then be back to near where we were at Scaleforum but in a more finalised condition.
  3. 10800
    A bit of trackwork that we never had on Mk.1, the down end of the platform loops have been closed so that we get an extra bit of scenic section before the fiddle yard, and a simpler fiddle yard entry with only two tracks instead of four.
     

     

     

     

  4. 10800
    Tonight's entertainment included plonking a Lumix TZ30 camera on a bogie well wagon and filming a trip around the outer P4 circuit on TT2. Two circuits in fact, one facing and one pointing backwards.
     
    The whole train (CK's) comprised wholly rigid wagons - no springing or compensation. There was quite a lot of other traffic running at the time too.
     

     

     
    How many trains, voices and faces can you identify?
  5. 10800
    This is the first actual part of Balcombe station. One of its features from the period we are modelling is a cast iron footbridge - not the one there now, which is an Exmouth Junction concrete product. It is shown here http://en.wikipedia.org/wiki/File:Balcombe_railway_station_1745357_cc3c259a.jpg . Of note is that at one end there is a conventional landing and staircase, but at the other the bridge connects with a covered staircase coming from the road above. The main bridge deck is also quite long as a result.
     
    This type of bridge is very common across the country and was bought as a 12in:ft kit from suppliers by many companies. Many years ago I had bought a Kemilway brass footbridge kit at an exhibition, and this was basically ideal as a starting point (there are many detailed variations). But one was not long enough, so I acquired two more to give the right length for the main horizontal bridge section. So here is what you get in three Kemilway footbridge kits (most of two on the mat, the rest in the box:
     

     
    These are superbly designed etches that make up solid looking lattice sections. The basis is the laminating of two lattice sections with opposite diagonals to make the x-pattern lattices. To make the length required I used the curved and horizontal sections from one kit and the horizontals from the other two:
     

     
    Half-etched channel provides the upper and lower stengtheners, and eventually you end up with this:
     

     
    At this stage I don't know how long exactly it needs to be, so for the time being I can't add the remaining detail and join the two sides. So I made a start on the landing and staircase which can be completed. The sides of the landing illustrate the same construction process as the main bridge section.
     

     

     
    These will attach to the landing, seen here with the appropriate under-arches.
     

     
    More to follow, probably as quickly as the 10800 loco progress (!)
  6. 10800
    I can't claim any credit for the canopies themselves, just the mobile phone snaps - which at least enable 'ground level' photos to be easily achieved! After previous warping issues with wood and plasticard they have now been done in brass.
     
    Other progress continues, 2 boards are now successfully wired, and we can run trains over them (DCC now) without resorting to the dog-on-a-lead approach.
     
    I'll let the canopy photos speak for themselves:
     

     

     

     

     

     

     

     

     

     

     

     

     
    As the platforms are all one piece and 6ft long, they now have their own secure storage box when not on the layout.
     

  7. 10800
    A bit more progress on the body. It's a whitemetal kit so it was only to be expected I suppose that not all the parts would fit perfectly, good though it is in general.
     
    Anyway, I removed the buffer beams since referral to photos showed they needed to be set back very slightly under the footplate - no matter, I'm dealing with stuff up top at the moment.
     
    So on with the short bonnet. After trial fitting with the end, I found the guides on the footplate were very slightly out for one of the sides, so I had to shift it slightly outwards, which needed a bit more fillet in the solder seam. Fortunately whitemetal soldering lends itself to this sort of thing.
     

     
    The roof also needed filing down fore and aft a few thou to enable it to fit.
     

     
    Nevertheless, there will need to be some filing and filling on the lower part of this side (below) to smooth the seam across.
     

     
    Then it was on to the long bonnet. The sides have just been tacked in place for now while I ensure that the roof and end fit as well as they can.
     

     
    The roof and end loosely in place. I won't finally solder the roof on until I've sorted the chassis, bogies etc in case I need to get access from above at any time in the process. The top of the end needs to be flush with the roof so that will need to be lifted by 1mm or so and the 'beading' at the base replaced with microstrip or similar.
     

     
    The cab roof loosely in place. It's nearly a mm short each side! Another opportunity to use the solder to fill in the gap, initially from the inside. Watch this space.
     

  8. 10800
    Since it's my namesake it really was about time I started on this Dave Alexander whitemetal kit of the prototype Bo-Bo that later became 'Hawk'. This is for Eridge, since the real thing spent a year or so on the Central Section of the Southern Region in 1952 or thereabouts, and I have photos of it on Victoria-Brighton via Eridge services with a Maunsell set in tow.
     
    Last weekend I had the opportunity for a few hours modelling (Jubilee open day at the community hall where DRAG meets) so I thought I'd make a start on 10800.
     
    First thing was to remove the lower set of louvres from the main bonnet sides, as these only came along after it left the Southern. No real magic here, just a sharp cabinet maker's chisel of the right width (to avoid surrounding hinge and seam detail) followed by rubbing down with a small piece of wet-and-dry on the end of my finger.
     

     
    (it's aberration on the camera lens, not curved sides!)
     
    The main footplate halves were soldered together with the bogie pivot plate, and the cab added. It's a while since I've done any whitemetal soldering, but the castings in this kit are excellent and fit together very well, so filling later will be minimal. There are two versions of the cab sides provided, one pair plain and one with a shutter - I stupidly didn't have any photos with me so I chose the plain sides, this being a better option if I got it wrong than having to carve off the shutters. I did get it wrong, but it will be simple to do a plasticard add-on for the shutters (which will give better relief anyway).
     

     

     

     

  9. 10800
    Eridge Mk2 is slowly getting ever closer to where Mk1 finished. Scenic landforms now cover the London end, showing the increased depth of scenery in the new version. These show how the low embankment of made ground on which the whole station rests (real) transition into a cutting as the topography rises (fictitious).
     

     

     
    More on the odd looking locomotive later!
     
    At the station end, the stream course has been carved out from extensions to the polystyrene baseboard surface, and the platforms have been reshaped but not yet bedded into the spaces between the ballast. Some new detail work has also been done on the main station building but things still look a bit precarious for any prospective traveller!
     

     

     

     

     

     

     

     

     
    And what about that locomotive? Not one that would be permitted on the line in reality, and it raised some eyebrows amongst the diehard Southerners, but it's a Churchward 28xx from a Finney kit - Mike bought it at the MRJ show (!) when it was one of the first etched kits for a 'large' engine. The chassis has been around for some years, but it now has a body and tender. With a Portescap motor, inside working valve gear, and pickups in the tender only, like all of Mike's locomotives it performed very nicely indeed.
     

     

     
    Rumours abounded that more of the boards were about to be upturned for completion of wiring, so things are certainly progressing.
  10. 10800
    The 'great lift' is now finished, with the addition of the final 2mm at the bases of the pavilions, and I have also put all the moulding detail around the tops of the pavilion columns - at least as far as practicability allows. I had previously done this on one of them, but that got trashed when I separated the roof slab to add the 2mm in there, so it's just as well I hadn't done them all before.
     
    This is what I'm referring to:
     

     
    Anyway, it's useful to show again how I did it.
     
    Main ingredients - Evergreen 1.5mm angle and 0.5mm square section
     

     
    Glue the section into the elbow of the angle, this gives a passable simplified representation of the moulding
     

     
    Cut to length, allowing a bit over for mitreing them for the corners
     

     
    Separate the collection of pieces into two equal groups, because there will be 'left handed' and 'right handed' mitres. Take a deep breath and get your head round which way to cut them - I used the Chopper for this:
     

     
    Do the other half the other way round, and you will end up with a collection of left and right-handed pieces ready to fit in place.
     

     
    I glued them with Uhu, and also applied some MekPak afterwards around the edges and at the corners to provide a bit more adhesion (well it works gluing chairs to ply sleepers).
     
    And here are seven of them completed
     

     
    John has the last one, but I've got all the bits to do that with when the time comes.
     
    This is roughly the same view as the real photo above
     

     
    Here I've experimented with some pencil lines to see if they can emulate additional relief that's not actually there - I'm not sure yet whether it will make that much difference (but I probably will do it on all of them when they're finally painted - more neatly obviously!)
     

     
    And this is what the 'big lift' was all for - to get the cantrail level of the coach about level with the top of the roof slab, rather than being nearer the bottom of the pitched section of the roof.
     

  11. 10800
    Apart from two pieces on 15 refuges (waiting for timber delivery) the refuges are now all done. Here are all 72 of them lined up, with the incomplete ones at the back. They still need trimming and fitting in places.
     

     
    With each refuge having 19 pieces, when the last 15 are done there will be 1368 pieces in the photo above!
     
    Balustrades are also all done, and here they all are, 70 'standard' ones and 8 'specials' which are a bit longer for the runs between the pavilions and the inner pavilion and first refuge. The standard balustrades have 7 pieces each, while 6 of the specials have 9 pieces and two of them have 11 (due to cutting/shutting standard pieces). So in total there are 566 pieces in the balustrades.
     

     

     
    I'm then going to sort all the refuges and balustrades out into A-team and B-team (hope there's enough A-team!) and start to match them up so I get the trimming and fitting as bespoke as possible - so when we come to fix them to the decks they will actually be numbered! Balustrades will go on first, and I will use 7mm strip to use as a solid guide by Copydexing them lined up along the edges of the deck - saves faffing with pencil lines. I'll have to dream up and make some kind of jig so that they are 'centred' in relation to the refuge positions.
     
    The pavilion roofs have also been lifted by 2mm. This first meant cutting the existing roof off at the top of the columns. The extra 2mm is provided by Evergreen 2mm square section, cut to length on the NWSL Chopper (would never have been able to do all this without one!).
     

     

     
    Here the longer edges have been glued on, and after that with all four sides.
     

     

     
    Here is the first pavilion with its new roof. There is also a 2mm slab at the base to show what it will look like finally, but the actual bases will be limewood again (delivery coming from Cornwall Model Boats).
     

     
    And here is all seven of them done so far (John has the eighth with him at the moment), and with a length of balustrade to show the preserved height relationship.
     

     

  12. 10800
    Despite John's excellent forestry experiments, it's probably true to say that we've 'relaxed' a bit since the intensive run-up to Scaleforum last September - see http://www.rmweb.co....post__p__496055 for a refresher.
     
    This hasn't been helped by diversions due to work, other projects, work etc although John and I have been busy at times mulling over some of the lessons learned and ideas stimulated from the exhibition. One of these was to add between 0.5 and 1m scenic section at the front and another 0.5m at the back to really give the structure some context and depth, and to force the viewer (not that force is really needed) to look at the viaduct from some distance away. More on this in a future blog entry.
     
    Another lesson taken (or rather realisation dawned) was that the summits of the pavilions were too low in relation to the trains - because we were still deciding on track bed and ballast thickness on the fly - and that somehow the pavilions would need to be raised by about 4mm. We thought about, but rejected, the possibility of cutting out the upper 3mm section of the viaduct deck, and eventually decided to add 2mm to the bottom of the balustrade plinths (and the refuges and pavilions) and another 2mm at the pavilion roof slabs above the columns. Some testing determined that this could be done without destroying the overall 'proportions' (remember this is all being done without any prototype drawings and we can't access the viaduct deck to measure directly).
     
    The first phase - adding to the base of the plinths - is now well underway, following another purchase of appropriate limewood sections from the excellent Cornwall Model Boats. All the balustrades have now been done, and as the photos show I am well into the 72 refuges as well. Limewood is lovely to work with, and quite therapeutic, and the photo of the balustrades shows that I have gently sanded the rectangular section upper coping to a gentle arc as per the originals.
     

     
    Otherwise here are the 72 refuges in various stages of augmentation (all but one upside down). 17 of them are complete top and bottom, the remainder are work in progress.
     

     

     
    And a length of balustrade and refuge together. There is still some trimming, sanding and feathering to do before I get a close fit due to the additional plinth material, and the upper coping on the refuges will need to be shaped to match the newly-contoured balustrades.
     

     
    There will be quite a few gaps and seam lines to fill, probably by PVA mixed in with sawdust.
  13. 10800
    It's been a long time since this blog was updated, and without the temporary platforms and some buildings it looks almost as if nothing much has happened in 10 months. Not so, much has been done to tweak the trackwork to make it reliable - even if it's not all wired up yet - and at the London end the scenic base for the cutting is now ready for planting and the insulation foam is now encroaching towards the station area.
     
    So here are a few snaps from last Thursday, with a variety of Mike's motive power being given a stretch on pulling and propelling back a train of 30-odd wagons into the up siding. This was done repetitively at well over prototype speeds with unfailing reliability - no video coverage I'm afraid. Here we have a J class 4-6-2T, a C 0-6-0 and a JB electro-diesel.
     
    Compared with Mk1, Eridge Mk 2 is wider and so there will be more of the 'train in the landscape' feel. The outriggers fitted beyond the original trackbed boards are now being filled in with more insulation foam as a scenic base. The real Eridge was built on made ground in the form of a slight embankment across the stream valley, but the layout transitions into a cutting which didn't exist here in reality but provides an excuse for the three-arch bridge at the end (based on Ashurst).
     

     

     

     

     

     

     

     

     

  14. 10800
    (From John) - some more progress. Much experimenting on the mortar course 'grouting' was done under the guidance of Tim Maddocks. Several paint combinations/types and finally Games Workshop 'Citadel' acrylics came out as the most user friendly and best for speed of application/process, considering the amount that has to be done!
     
    The resin cast corbels are only temporarily attached and are to be replaced with ones from Shapeways 3D printed ones in due course.
     

     
    The top structures in grey primer prior to being finished with a beige colour to represent the Caen stone.
     

     

     
     
     
     
    (From Rod) - these are probably the last photos before Scaleforum in (gulp) three weeks time (well we have to leave something in anticipation!). Just to add to John's photos here are some showing the early stages of terraforming and a bit more detail appearing on the balustrades - still in workshop photographic grey - in the form of limewood strip to represent the coping.
     
    At this (London) end the viaduct continues onto an embankment before rejoining the background topography; at the Brighton end the land rises more gradually from the valley floor to the higher ground to the south.
     

     

     

  15. 10800
    Six weeks to Scaleforum, and the London end is really starting to take final shape. The corbels (brackets) for the refuges are preliminary versions, more detailed ones are on the way.
     
    We also now have the stripwood for making the copings for the balustrades. In due course the levels of the pavilions and balustrades will be adjusted to get the relative levels of pavilion and train absolutely right (something also affected by the track and ballasting configuration).
     

     

     

     

     
    A few snaps of the 'London' pavilions section with experimental primer.

     
    The first resin cast brackets to be replaced in due course.

     
    At this stage all the constituent assemblies are still to be correctly positioned and permanently glued.
     


  16. 10800
    Nice to see that we have passed the 10000 views mark - we appreciate the interest.
     
    Here are the two prototype 3d-printed corbels loosely in place on one of the viaduct sections. Just the job, although I can see we may have to face the edge of the track base with plasticard strip to disguise the lamination join - or fill it with something prior to painting.
     

     
    Yesterday John made up a jig from some bits of brass in his scrap box which enables the accurate trimming of the pier apertures for cladding. Inevitably on a build like this improvements are being made all the time as we progress, to the point where probably no two piers have been built exactly the same way!. Hopefully this won't detract from the overall appearance at the end.
     

     

     

     
    Meanwhile I got on with batchbuilding the remaining seven pavilions.
     

     

     
    Here are four of them in various stages of completion loosely plonked on the appropriate track bed board.
     

  17. 10800
    It's been a while since the last update, but progress has continued nonetheless - even if not much of it has been by me (work just continues to get in the way). And John seems to have lost his ability to post to the blog directly (Andy is looking into it).
     
    After finishing off some of the outer piers (where the plinths don't come into play) John moved onto, or rather returned to, the inner ones. This is where the tapered piers are inset slightly on the rectilinear plinths, and we now seem to have arrived at a workable system of ensuring that the 'inset' is even all round. There are a couple of points that have caused a bit of a problem - irritation with one and Doh! with the other. The irritation comes from the Slaters brick card where the straightness of the brick courses can no longer be guaranteed and so squareness and matching of blocks of brick is a bit of a lottery - we can only assume the tool at Slaters is old and worn, in any event there is a market opportunity out there for an accurate replacment. The Doh! is because I forgot about the inset when arranging for the semi-circular etches, and the apertures are slightly narrower in the plinths - so we really should have had two sizes made. Never mind, there's always a workaround, especially when we can direct future photographers to ones we know are better than others! Yes we could have had more etches done or had all the brickwork laser etched to start with, but there are budgetary limits!
     

     

     
    Meanwhile, up in Kent, Mark has been busying himself with resin casting and 3D printing, the technology for which goes straight over the heads of John and myself. We just marvel at the results, and Mark deserves huge thanks for all his efforts here - largely spontaneously too.
     
    Firstly, we now have the resin cast roofs for the pavilions:
     

     
    And not one, but two options for the corbels, one in resin and the other 3D printed by Shapeways. Both are very good, but the crispness and Mark's sanity probably mean that we will go for a production run of the Shapeways version.
     
    This is the resin version:
     

     
    And this the 3D printed one:
     

     
    Finally, it has now reached the public domain via Scalefour News that the viaduct will form part of a themed demonstration on modelling BR (Southern) at Scaleforum at Leatherhead in September (24th and 25th). It won't be completely finished of course, but the objective is to have the whole basic structure up, with some run-ins at each end, and one end at least sceniced and detailed as far as we can. And some form of train movement will be available, even if one of the temporary tracks might be (sshhh) 00 for the occasion.
  18. 10800
    A few entries back I showed a 'completed' pavilion. But on returning to the viaduct for another recce a month or so ago, we found that the roof construction was somewhat different so it was back to the workbench for another go.
     
    The objective this time was to come up with something like this:
     

     
    So here is a photo sequence of how I did it:
     
    1) Build basic subframe (2 x 2mm Evergreen section)
     

     
    2) Attach 'under-roof' using 0.5mm plasticard - in black so you can see what you're doing more easily in the later stages
     

     

     
    3) Then with 0.5mm white plasticard build up the overlapping layers, starting with the longer sides
     

     

     

     
    With the shorter sides it was a case of measure > cut oversize > offer > trim > offer again > fix (sometimes with a bit of > throw away and start again) but it was still difficult to get the joins completely straight and flush, so
     
    4) Finally, I added 0.5mm Evergreen section along the corners to make it look neater
     

     
    And then with the main structure again
     

     
    The roof took a few hours altogether, including thinking time, and I'm planning now to use this as a master for resin casting rather than making another seven 'identical' ones.
  19. 10800
    Well, yes and no. It's great to see it again, but there is a real risk of seeing things you have done a bit wrong in the planning. Some you can do something about, others you can't.
     
    Anyway, we've just been up to Sussex for another reccy and check on a few details, especially concerning the piers. But first, here's a picture of the whole thing - there are pics like this on the internet, but this is the first time we've been up the public footpath far enough to get to this vantage point.
     

     
    Down below, this is the last pier (nearest) where the plinth is still visible just above ground level. We call this Pier 31 (out of 36), numbered from the Brighton end.
     

     
    On Pier 31, the inverted arched brick courses at the base of the aperture just touch the top of the plinth
     

     
    On Pier 30, the arched courses are beginning to extend into the plinth, but the 'up' and 'down' sides are different! This is the 'up' side
     

     
    and this the 'down'
     

     
    By Pier 29, the arched courses are nearly all in the plinth
     

     
    And by Pier 28 they all are. This is one of the tallest piers down near the river (Pier 18). The river is between Piers 16 and 17.
     

     
    The inset around the plinths means that the etched arches in these piers will need to be cut-and-shut to accommodate. Something we missed before, but which can be modified because they haven't been fixed yet.
     
    Something definitely wrong in the plans and cut MDF is the distance the refuge 'outsteps' protrude. I had estimated 2ft (8mm) but it's probably more like 1ft 6 or even a bit less. Not going to change this now though.
     

     
    I'm not 100% that we've got the degree of taper right on the piers - may have got it too slight - but it's not far out and again we're not going to change things at this stage
     

     
    I think we've got the decorative brick section at the top of the piers about right though (Mark Leigh / Ark Royal has done some trial mouldings of these, and we are going to go that route rather than the plastic strip construction, mainly to save time.
     

     
    Being able to get a bit higher meant we could see a bit more detail on the pavilion roofs, and these are going to have to change on the model. Fortunately I had only done one so far!
     

     

  20. 10800
    We think we've cracked the issue of how best to join sections together. The following photos show (using a couple of demonstration end sections and a 'real' pier) how it will work.
     
    Rather than have a separate detachable pier for the joins, which creates additional problems regarding planting in the scenery and so on, the pier will be 'half' attached to one end of the two sections to be joined.
     

     
    The dowel and the square-section pins provide for alignment. The pins have holes drilled into them so that when mated they can be locked with round pins pushed in from the top.
     

     

     
    The pins will be disguised by covering with cable ducting on the trackbed. A detachable refuge will be placed over the gap between the balustrades. A detachable 'batwing' shaped piece of brickwork will go over the join and extend to the crests of the adjacent arches to minimise visible joins.
  21. 10800
    I've now finished (I think) the first of the eight pavilions required for the viaduct, except for the painting which can wait until they're all done.
     
    I'm always supercritical of my own work (aren't we all?) but I'm quite pleased with this given there were no drawings available and access to measure was not a practicable option. It's not as detailed as the real thing, but in view of the scale of the whole model and the distance from which it is likely to be viewed I think it conveys the essence well enough. When painted I may use pencil lines to suggest some of the other panelled detail, we shall see.
     
    There are 69 individual pieces in this structure, made variously of MDF, limewood, Rowmark and other species of plasticard. The fiddliest bits by far were the decorative coving around the tops of the pillars, made from Evergreen 1.5 x 1.5mm angle with 0.5 x 0.5mm section set into it, then mitred to form a 90-degree L-shape. I hate roofs, and made this based on longitudinal and lateral plasticard formers underneath, but I still couldn't get a perfect join for the four sections - so I filled the gaps with more 0.5 x 0.5mm strip to make it look neater even if it's not authentic. Also there is a piece of 2mm angle on the top to represent a final ridge tile and hide the unsightly join of four pieces of Slaters! I might try a wraparound one-piece card substructure for the next one.
     

     

     
    And, to show that I know no fear, once again the real thing B)
     

     
    Another experimental item is this representation, again based on Evergreen sections of various kinds, of the decorative brick detail at the tops of the piers. We haven't ruled out resin casting entirely for this (decision tomorrow when we have a get-together with the Eridge team) but it is at least an achievable option.
     

     

  22. 10800
    When we were up at Balcombe last week, there were a couple of photos in the booking hall of the station in previous years, with a contact name and phone number for copies. Well, I rang this gentleman and what a diamond and fountain of knowledge he has turned out to be! He's lived in the village all his life and appears to be the community archivist, and has all sorts of other views and anecdotes as to how the place developed, filling in a few details that we couldn't work out.
     
    He has already forwarded on some other photos (by mail, for free) and even his 88 year old mother has contributed some thoughts! He's not a railway modeller, although he spotted as a kid, but just seems to be pleased that someone is showing an interest in his village and is mad enough to want to build a model of the station.
     
    A pub lunch at least for him next time we go up there!
  23. 10800
    The first part-finished section of the viaduct made its inaugural public appearance at the RMWeb Taunton bash yesterday, including some powered running across it for the first time.
     
    Many thanks to John for all his hard work in getting it to this stage, not without its trials and tribulations, and to Pete for his help yesterday. It was gratifying to receive some positive feedback and encouragement based on what we had done so far, but also a reminder on how much more there was still to do!
     
    Here are some pics though - it isn't finally glued up, so there is a little misalignment highlighted by the last photo, and a slight droop at one end which will be fixed by packing at the base before final and permanent assembly.
     

     

     

     

     

     

     

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