If you read the write up on ebay, he says that his choice of motor doesn't work very well with the Mamba Max. He does say that he was using a Quark 80A controller. He says that you control the power by adjusting your battery configuration. He recommends 4S and says to watch the temps on 6S.

His method definitely reflects some out of the box thinking, but I'd prefer to have a slipper or some other form of stress relief. I'll bet I could break it. LOL.