It took a while but it is great to finally see finished results of big projects.
Size wise they are correct in all major dimensions and the Shapeways 3D printed cabs were key items to make them work visually next to for example a Kemtron GP7 (not to mention looking correct next to freight cars!). About those cabs, I have mixed feelings. On one hand, they are to scale and are better than any cab I would have scratchbuilt or kitbashed. On the other hand, the surfaces are not all smooth. The roof area of the SD cab is very smooth, for example, but the sides have “lines” of horizontal texture. I could have attempted to sand it off but at the same time felt that might be risky and likely to cause new problems. So I left the cabs as they were.
In my general article on 3D printed parts I note that the FUD material requires special cleaning and acrylic paint. I figured I was best to paint the plastic parts with the standard red I have used for years on Orient Diesels and to paint the cab a contrasting yellow for a modern scheme. That decision worked out pretty well I think.
In part II I was getting to final details. Mostly the handrails are the original ones associated with the donor models. On the SD40s I split the end handrails and added chains, a fun detail to add. Another big final thing was getting them running. Both of the SDs are powered, one drive being not in as good a shape as the other it turned out. I had to replace four of the six main gears on the axles associated with the wheels, they had split. I have had to do this before, it is a design flaw of these old Athearn drives. I don’t think it is noticeable really that the trucks are HO scale, they disappear visually under the model.
I am enjoying running all three together. They will pull anything I put behind them (some of the Johann built modern cars I have are quite heavy) and it has been fun to get out his TOFC models again as well. Finally I have correct engines to pull those cars!
It has been a great project and it will be interesting to see what additional worlds 3D printing opens up in American OO. But as for me I think with these Diesels done I will change directions a bit and focus on some older school restoration projects.
Return to Part I of series