Well, yeah, that too. I want to try and avoid using pulleys/chains though, so I thought I'd try it this way first. And if my motor explodes on the first impact, I'll know its time to buy some pulleys. As for usable rpm, my kv is already quite small, so if I do end up with a pulley it'll probably be 1:1.

Anyway, we've drifted a bit off topic here... Is anyone planning on using anything bigger than a 1300mah?