Hmm, I didn't really think much of spikebots, but now that you mention them, that could indeed be a problem. I suppose the best thing to do would be to put a piece of HDPE along the front at about motor height, although I'll need to account for that in the weight. Shouldn't be too much more though.

Also, does anyone know where would be the best place to get the 30A BotBitz speed controllers? I've heard ranglebox but they seem to have been out of stock for a while, and ordering them directly from BotBitz could take a long time.