A similar concept http://www.cgcu.net/robotwars/?page=constructionhttp://www.cgcu.net/robotwars/?page=construction

Two seperate controllers rather than the Sidewinder ...perhaps one of the Victor range?
http://www.ifirobotics.com/high-voltage-speed-controller.shtmlhttp://www.ifirobotics.com/high-volt...ntroller.shtml

The Spektrum 2.4GHz RX/TX with two BR6000 receivers.
http://www.robotmarketplace.com/marketplace_rc_radioDX6.htmlhttp://www.robotmarketplace.com/mark..._radioDX6.html

Have a look at the A123 Batteries .....http://www.a123racing.comhttp://www.a123racing.com