We have have won fights having blown motors! At MMM I think we only had one fight in which we didn't destroy a gearbox and thus a motor.

I don't think the speedos will mind having a stalled 550 on them. Even two, which unless something goes really wrong, will never happen. Not only should they be fine on paper, but in practice, again, the ESCs were subject to stalled motors at MMM and they were fine.

I have an idea that may solve some of our gearbox issues anyway, which in turn should reduce the number of motors the machine eats, actually reducing stress on the speedos.

Have spoken to dad, and we'll get some 80a and 100a jobbies on the go soon. Thanks again.