Ive got five of them already. Im not sure theyll be up to the job though. Roger recommends the NCC-70 for the reliance motors, and the Curtis controllers also claim to do 70 amps continuous (no idea about peak). So I dont know why Chris had trouble with the 4QD boards (he was using higher power versions than the NCC-70, I cant remember which ones though), but it does suggest that I need something with a bit more power.

I suppose I could risk one just to see what happens - but I got such a good deal on Bob that £410 for the RobotEq doesnt seem so bad.