I saw a few of your vids a while back and was pretty impressed with the power. Lehner/Schulze or Lehner/MGM combo's never seize to amaze me. I am currently converting my MCD 1/5 MT but its going to be brushed for the purpose of being able to get wet and the "no cogging" affect like some brushless apps have. I will be running a powerful brushed robotics CIM motor on three "12v" PB's 5000mah packs in series which is equivalent to a 10s lipo setup. They are also hardcase like all PB's which makes me feel safer.
I am still debating if I should use a HV brushed "r/c" esc or to use a scooter brushed "esc" with a potentiometer hooked to a servo for thottle. Brakes will be mech. Im hoping to get some dirt flinging action out of this thing.