Leadfoot...the Millenium should work, but you have to be careful not to overcharge teh pack. You'll need to set the voltage threshold as low as it will go, and keep a fan on the pack. Monitor it as it gets close to the end of the charge cycle and stop it if it gets too hot...
I'm with STLNLST...use the Turbo30..should work better.
Axis with foams should be fun. You may have trouble breaking upper camber links if you hit something. The large foam tires seem to put a lot of stress on those things. You'll probably have too much traction to start...
Good luck...
Mark