To add to Alex's previous posts, whilst I know people have had problems with even upgraded VESCs I feel it is worth pointing out that we haven't had a single Mangle VESC failure in almost a year running the scorpion HK 5020 450kv motors, of which we use 8 at a time. Their peak is 120 amps at 5320 watts, which we have made full use of. Yes Smash is only 60kg but we have driven with 2 HK 5020s moving well in excess of 110kg.

Eaun ; What sort of price are you trying to bring your brushless ESCs in at?