[sanddrag]

Also, there is only one Taigene Van Door Motor in the kit. You may not use two. As far as backdriving, I would say yes. Do this, take your motor (not hooked up to anything) and put an adjustable crescent wrench on the flat spots and crank it. It is not too hard to backdrive. You can reduce the effect by setting the jumper on the speed control to "brake" but this will only reduce it a little. To try that by hand, do the same thing as above but touch the two wires from the motor together while cranking. It should be a little harder.

The concern of tripping the 120A breaker does not directly relate to the number of motors but how much current those motors are drawing. You could probably run 30 motors at the same time on that breaker if they didn't have any load.

Theoretically it would be easily possible to do under an intense pushing match but in reality that breaker can sustain much more current for a substantial amount of time. The only time we've tripped ours was in 2003 when we were practicing for a long time and driving with lots of binding in the drive system and the "suckers" were deployed and dragging on the carpet for a long time. But beyond that I've never heard of anyone trip it.