I have a P2K2 27t motor in which I race stock and a Novak gtx esc. It has no brushed limit but it doesnt do brushless. So brushless is out of the picture now. I have about 25 runs on my motor and I just got 2 sets of new brushes. I was wondering since I will be racing should I get the comm cut now or wait until say 40-50 runs? What will happen if I dont cut my comm? I have a couple motors being shipped to me, a Checkpoint 19t with 2 sets of brushes, Orion Element 19t 2007 version, Peak 13X5 and a 12X5 armature. But my LHS charges $10 for the 1st time he cuts it and $30 every other time!!!!! The motors I got have their comm just cut but I dont know how long I could go without cutting the comm.

And is there is "poor mans" method for breaking in brushes? My Duratrax Onyx 230 doesnt do motor break in.