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I too have found anomalies when putting drawings into Fusion, which of course can measure down to an amazing number of decimal places! I think some of the issues are down to the thickness of the pen/pencil lines abs others due to the impossibility of the human hand matching CAD precision. Then of course you can throw in parallax errors from photos and photos of drawings! My work in progress of a Hawthorn class saddle tank looks different to the drawing, but matches the measurements - all due to parallax issues when the drawing were photographed. Mitigation? Measurements and pictures combined with drawings; and remember absolute fidelity is impossible no matter what sone might think. There is always a compromise! Duncan

On the other hand, with such relatively poor levels of info out there (photos drawings etc) for BG at least it’s hard for us to be proved wrong! D

I noticed that the trailing wheel splashers seems to missing on the GA of the 3521 0-4-2st but they can be seen in photos! D

On the subject of inaccurate drawings, I found that the drawings I have of Firefly do not include the mini-splashers over the carrying wheels, although they can be seen in photographs. I only realised after I built my model and found that true scale wheels would not fit. I've now re-designed the footplate to include these splashers:

Thank you Mikkel - making the model has changed my mind about these engines and I now think they are rather handsome. I'm still simply enjoying exploring what I can do with 3D modelling. I haven't given any thought to actually running any of these models and they may well remain as 'display' items. All the photos were taken without any significant cleaning up of the prints, apart from removing obvious loose strands and the like. I think the wheels would need proper metal rims to make working models.

It does look good, nothing particularly ugly about it. I'm impressed that you managed to do the outside flanges on the wheels. Might they need some sanding etc to go through pointwork?

A reminder of the intent and a before and after. https://paulbartlett.zenfolio.com/lmsparcels/h157ec466 Not quite as bought but pretty near. Ex-works condition prior to weathering and glazing. Almost there!!