While the parts on their own looked good I thought it was worth showing you how the loco looks roughly assembled with wheels fitted.
Obviously the axles need cutting down in length, but they were just fitted to test that the bearings were nicely aligned and that the chassis would roll freely. Unfortunately I found that the holes for the bearings were slightly too small. I'd intended brass bearings to be a push fit into the print but I had to ream out the holes slightly for the bearings to fit. This was easy enough to do for the wheels, but the holes for the layshaft bearings are harder to access so they will need to be made slightly bigger on the next print to make life easier.