Final update. I got the replacement pads installed on the 2 original carts, and now the slow one moves faster than the fast one. It turns out that I couldn't get any 2 of the 3 to sequence correctly due to the speed variations. However, I did get the 3 cart configuration to work successfully. Cart 3 would come into the shed with carts 1 and 2 in there already, release 1, and then 1 does its thing around the track, releases cart 2, and so on. I ran that for over 5 minutes without a hitch, so it's ready for display.
I spent some time customizing the carts. I detailed some suitcases (painting the handles and latches), added some unit numbers to the back of the cart, added a much needed 'Keep Off' sign on the sides of the cart, painted the exposed axles, and then gave the little guys some eyes.
I know, kinda lame, but it gave me something to do.
