First of all I must apologise for the lack of pictures tonight. I have finished updating the etch artwork that was the subject of the last post. This has taken a little longer than I thought due to having issues with swelling of my right eye for no particular reason not helped by a misdiagnosis the first time I visited the doctors. After several days off due to pain and problematic vision I got about sorting out the issues identified in the test builds. I included a chassis with a sliding centre axle on the fret, rather than having to use a cleminson chassis, although it will still be possible to take this route if desired. I also thought again about other diagrams and it is apparent from any photograph of a milk train from the early 20th century that to be representative it should probably have vehicles of differing heights, widths, lengths and include several vans for the various cuts.
I have already covered diagrams O2, O1, O3, and O4. O2 has a different end profile but these are all 6'8" body height. Diagram O5 is similar to O4, but with 7'6" body height to allow an extra layer of crates for fish to be loaded. This would provide for different height vehicles, so I have drawn this and will be adding it to the sheet. With an alternate set of ends I could provide for the O6, which is an O5 with end doors, like a Siphon H. I'll have to see what can be sensibly catered for in the space of the fret. It might be sensible to consider these as two separate items. I hope to be sending the revised sheet off for etching early next week and further hope that everything is right.
I was also considering drawing a Siphon C (diagrams O8, and O9), but there is already a kit for this in the Scale Link or Shire Scenes range. I have seen a picture of the etch and whilst not perfect I think it should be possible to produce a decent model from it. The inside planking for the end doors is not on the fret, but it could be cut from planked plastic sheet, or scribed separately and inserted inside the end framing. It would seem a bit silly to duplicate effort, and in addition I don't fancy my chances of getting the louvres right first time. I believe that all the longer siphons are available from Ultima Models so that allows for plenty of choice for vehicle length within a train.