I recently ordered two 3D-printed models from Isinglass Models, a pigeon van and a Dia 164 LNER TPO, to try out the water.
They arrived very well packed, each in a nice bespoke box, with scale drawings and extra information.
Apart from sides, ends, floor and roof you bogies (I forgot how it's called when the wheels are not in bogies, but you get these too with the pigeon van), torpedo vents, gangways, exchange gear (and netting!) where aplicable. I only needed decals, wheels, bearings, interior, glazing, buffers and hooks. And steam/vaccuum pipes, which I won't add because it would complicate running.
The service too is top notch, fast and complete.
No stakes, just a very happy customer. Highly recommended.
The TPO is comming along nicely, will be great to have it run behind a LNER Pacific with a rake of Gresley teaks.