Before I left the shop last night, I drilled a 5/16” hole at the inside of the car coupler. This morning I cut, sanded, sanded, and sanded some more to shape both couplers.
I cut 4 axles to length and glued one wheel on each axle. Now I need 4 trim spacers. They are 1 3/8” X 5/8” X 3/8” with a 7/32” hole and a 45° cut on one end.
Now I need to make four wheel trims. On the plan there are 9 dimensions and 2 diameters and I could do the layout.
But these are full size plans, so I just photocopied and glued.
-- If we learn from our mistakes, I'm getting a fantastic education.