thecanadianrail wrote:did....did you actually model the cotter pin in 3d on that nut?!?!?!?!?
Yep

Don't worry though, I didn't use many polygons. I optimized the geometry (manually) and used some visual tricks to enhance the 3D. I like to be able to go up close to the locos and inspect the parts, so it's worth the extra to make them look as real as possible.