at K/N's trophy race this past sat. i ran 3rd in the B-main with Axiom power cant wait till u get the new cells only had 2 pks that were good enough to run , we were working on a new car and trying to get the rollout right but paid off with a nice finish after a yr+ off.what brush and spring combo do you guys like in the co27's and what amp draw is good out of these.