MikeTrice

I may be thick but what kit are you referring to?

Yes.

They are 8'0" Fox Patent bogies. Have a look at this thread: https://www.lner.info/forums/viewtopic.php?t=10472 You are in luck. Removing the duckets will expose the panelling Rapido thoughtfully included underneath. More info here: https://www.lner.info/forums/viewtopic.php?t=9331

Next time try toothpaste.

At the time of the Exchange Trials it was heavily weathered, almost black: https://www.pressreader.com/uk/steam-days/20201211/281543703520681

The end grills should be solebar colour, not polished brass:

When you have finished curing, and even some days later, try putting the shell in very hot water and you may find it flattens any bowing.

Just discovered this via another forum and had not heard of it before. https://uk.humbrol.com/products/creator-3d-mini-printer-ag9172

The one time I tried Chinchilla dust it was made of ground clay. When glued the clay dissolved and expanded, then on drying shrank and cracked so I have not touched it since.

You are probably way beyond this point but comparing the 3D model with the Deltic image I would say the side profile is too rounded on the model where it should be more hockey stick. Have doctored your image to exaggerate:

Ken Pelham

From memory the manual is also on the stick. If not it can be downloaded from the Anycubic web site.

I suspect the gangways might be undersized. You might like to check out If you go back through the topic you will also find some scale drawings that might help. Good luck.

Before adding the beading I think I would have been tempted to use some form of grain filler.

I seem to recall many years ago Simon put up a sample coach on Shapeways that he (at the time) deliberately enabled users to download and try at home. If he were to upload it here, that would give people the chance to evaluate the quality of his stls and try printing them.