So the lovely people on engadget.com have had a chance to get their hands on the boosted board and take a ton of close up photos of the drive train.
While the article itself isn’t the most enlightening for someone embarking on a self build the photos are: http://www.engadget.com/2012/09/12/boosted-board-electric-skateboard/
Now I’ve just ripped these photos off engadget website watermark and all without permission. So engadget I don’t know if this fucks with your copyright or whatever but just give me a shout if you want me to take these down.