Its all good man. The brushes can be perfectly parallel and still not be centered with the comm, this is what I was attempting to imply on my previous post. Remember, its the TRINITY hood alignment tool that sets the hoods at a near perfect 90 degree angle from the comm and parallel to each other. But, in this unperfect world, even perfect is unperfect because different motor manufactures build different brush hoods, springs, brush hood dampners, endbells etc. using an unperfect manufacturing process. This causes each motor to be "slightly" different from the last on average. Now..... I do know that A-Main doesn't stand for the "Average" guys main, nor do I know a fast racer that only does an average tuning job on his motor.
Keeping that mark perfectly in the center of the brush face when setting up a motor is much more important than narrowing the brushes, polishing the bushings, expensive heavy heat sinks, or any type of crappy "Magic" comm drops. A centered brush pushes again the commutator evenly on both sides of the brush face (reducing arcing), the springs pressure stays more consistant against the brush (reducing brush bounce), and finally my good friend Pit, the stock motors PRESET timing will be accurate and effective. Do you think Jim Dieter uses TRINITYS brush hood tool on Matt Francis' Worlds motors?