I tried a couple of sets of gold brushes in my monster stock and they both lasted one run. I tried purple red springs the first run and red green the second. They werent burnt or got hot they were just gone. The com was fine slight cut cleaned it right up. What did I do wrong was it all gear do I have to adjust it to compensate. I put some trusty 767's back in and they barely wore at all. What did I do? They were fash as HeII for about 3 minutes.