hi, the tank tread idea seems to be a good idea but in the competitions in NZ they don't seem to be working that well. I think for the idea to be reliable you would need to create some sort off suspension between the treads, i had an idea of using slotted plates and standoffs with rubber bands around them to create floating rollers that would let the treads expand to hold the cubes securely (i would like to prototype the idea but unfortunately my team doesn't have a set of treads yet). BTW i really liked your pneumatic claw set up, using steel cable and attaching the cylinder at the end of the arm, i thought it saved a lot of weight at the end of the arm where it counts good luck for Saturday and see you then.
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YAY won 6 out of 8 New Zealand VEX competitions!
(and only killed Three servos in the process)
at least we made the semis
Its not a hole its a controlled leak...
Winners of the New Zealand excellence award (yay going to Dallas)