goin for a ride

Nice design, interesting finish. I found the motor wheel timing difficult. Managed it from the metal block rather than the stone step

Spoiler: Timing too hard?

you could try launching B off the lower arm of the draggable.

The rotating rotor was hard to get and I thought your object was too heavy for B but it wasn't (you know what I mean ). Thanks

My B has failed to climb. In the end I gave up.