Thanks for the responses! I've decided to just go for the tried and tested brushed setup with some drill motors and Botbitz speed controllers, no point messing about on a budget like mine! Hoping to try again with the brushless setup if I ever find a pair of suitable controllers for it, mind. I've found some RC car ones that run on 4s, but I'm not sure if they do proper reverse, and I'm aiming for at least 6s anyway. Still sticking with the brushless bar spinner anyway, only need one direction for that!