Loved this when i saw the picture. It lives in the Railway Museum in York, but 5" scale models are to be found in Brighton, Exmouth and Worthing according to Wikipedia.
A tender will follow as and when. Tender now included. The mid sized wheels fit this. (The loco's rear wheels.)
I have used the same device as I did with the S160 so that the wheels will spin freely and adjust to corners. This involves a bushing made from 4mm plastic tubing, usually meant for drain pipes and the like, cut into 4mm lengths and split with a removal of a 0.5mm slice. I have included a screen shot showing the wheel/axle assembly using this solution. The reasons being, the resin does not freely glide against itself or the Peco wheels, a means of holding the axles in place was needed, and this system allows the wheels to drift a little in their housings which is necessary when a long line of wheels go round corners if they are not on bogies.
Designed to print with Elegoo mars SLA 3D printer.
The author hasn't provided the model origin yet.