[Chriszuma]

Very solid robot. Probably the best rookie bot i've seen; follows the KISS method nicely. Also, I have to say that you have one of the coolest names ever as well.

As for protection, I would just reinforce the heck out of the mounts, and upgrade to schedule 80 pvc. That ought to be indestructable. Now, the inspectors might not like it too much, so you could mount a piece of polycarbonate shielding on it just to make them happy. This shield could even be velcro'd on, its sole purpose being to keep fingers out of the roller.

p.s. I love the 6-wheel drive. Definitely a solid robot.