Just to let you know the pitfalls of owning a heavyweight.Last year we spent amongst all of the day to day costs of keeping it running the following on And His Army: 2 x Bosch 750 motors @ £110.00 each, 1 x RoboteQ speed controller $500.00 which blew after 8 minutes use ( replaced by RoboteQ), 3 x Hawker batterys gone down @ £90.00 each ( replacement nicad packs £80.00 each). We also had 2 x wheel hubs made which would have cost a good deal had a good friend not made them for us.
All of this resulted in our machine being seeded 7th for this year.It is a rambot so we had no pneumatics or hydraulics to replace or who knows how much more money it would have swallowed up.So I would agree with the others, think long and hard before you decide to start out with a heavy, it is no fun being beaten up all the time, with an unreliable robot that just keeps letting you down, just ask Wendy about Stagefright.