Chris - we ended up on Turnigy's (supposedly) water-cooled 180A ESCs for the drive at the moment.

One of them doesn't like how much power we're pumping through it in extended tests - but we think that's actually a mechanical issue as the drive is much more reluctant to turn on one side.

Hopefully we'll fix that fairly quickly....

Was in the middle of replying - Rob beat me to it because I'm currently in the middle of a field running paintball/airsoft/laser tag events.....