My first shapeways creation!

[nachoman]

Here is an example of how a 178 box needs to be modified. This is an AHM flat car converted to HOn3. As you can see the rear of the coupler box had to be trimmed behind the screw. As for the screw itself - this is a 2-56. I suppose an 0-80 would be much less visible. But I like the 2-56 because I can buy them relatively cheap at the Ace Hardware up the street. That's an advantage if I run out and need a few screws to finish a project .