chassis help....

[maxxdude1234]

I've got a second hand, but basically new, xtreme carbon fibre brushless maxx chassis. The chassis is awsome, and my truck now handles like a 1/10th on-road.

However, for some reason I keep on stripping spurs very very very quickly (about 2 hard accelerations). I'm using the stock slipper/spur set-up with 12 pegs, and I'm running a 2000XL on 18cells (ie. gobs of torque). I think I've narrowed the problem down to the mount mount; as far as I can see its twisting under the torque, and hence altering the mesh between the pinion and spur. I'm using the motor mount in this photo, http://www.xtremercracing.com/Images/BLBSIDE.jpg . I don't want to use the stock motor mount, because that will raise the CoG a lot.
I wonder if using the strobe slipper with a blue delrin spur would solve this problem, or if anyone else has had this problem and how did they fix it?

Thanks