Dave, this is one heck of fine project! I build (not design) models in 1/100 and when the wheel discussion (2D vs 3D) came up, I just had to add my 2 cents. I like 3D wheels on all my vehicles. If the kit does not have 3D, I find a hole punch as close as possible to the wheel size and punch a stack of holes in 110# card (to the thickness I need). I then press the stack to flatten the edges evenly; hold it with tweezers; apply a liberal amount of thin penetrating CA; then carefully transfer the stack to a piece of pre-positioned wax paper and let it harden overnight. OK, I know it is over-fiddly, but it does work.
