Well, on my home track with medium traction the B44 out of the box didn't perform as well as the good old XX4. I can't wait to get the MID conversion kit - I think it's gonna do the trick!
Weight forward = advance forward = WIN
Olivier, is that the "H-Energy 4500" cells you are using? I bought one pack last year, and it was totally useless... (might have been a bad batch of course) Absolutely no power!