[DonRotolo]

McMaster will get them to you tomorrow if you order by 6 pm today. You can also buy #35 sprockets in lost of other places, like Grainger. Use Google and see what's near, call them and drive there for same day service.

I know you lifted the robot into the air and it *seemed* fine, but we're trying to explain some of the finer points of drivetrains to you.

Measure the motor current with the wheels in the air. It should be only a few Amps. Let us know if you don't know how, happy to explain. (What this tells you is IF the gearboxes really are tight or not. They often are, and need an hour or 2 running time, unloaded, to loosen up. You can lose 25% or more of your power here!!!)

Please, please, tell us the sprocket sizes top & bottom! And how big those wheels are! We are problem-solvers by nature, we just can't help it, but a problem with insufficient data is our version of Hades. Have pity on us, tell us...