Update:
I got the first set of parts just before Christmas, and managed to do a fit check over the holidays. I ended up making a few minor changes to the design. First, the coupler cut bar was broken on one of the parts. Shapeways will send replacements for things like that, but I think in this case I may have been asking a little too much of the material. So the cut bar is now a separate part, like the hose assemblies. This has the added benefit that it is replaceable at a later date if it gets damaged (as happened on my GP9). There were also some minor clearance issues between the pilot and the detail wires on the trucks, so I made some changes to improve that.
No real impact on the appearance, though:
I also changed the coupler mount so that it can now either be bonded to the chassis or screwed to the existing bosses on the body shell:
The mounting boss on the truck for the electrocoupler does interfere with a kadee 740 when installed as pictured. I have cut the bosses off the trucks on my other engines, where needed. I like to be able to use the metal gearbox 740 and all four mounting screws. Alternatively, one could leave the truck bosses and shave the back off a kadee 740. This fits fine, and allows the standard travel and swing of the 740, but without the innermost mounting screw. Or finally, take the really easy route and use a 743. The truck boss clears the coupler mount in any case.
I've submitted the updated model for fab, so I'll update again hopefully in a week or so when it arrives.
