Listen to Nick pull those fucking butterflies it makes a hell of a difference it pulls like a freakin train all the way through the rpm gets rid of that annoying dead spot... before you attempt to pull them go buy a new 8" minimum magnetic tip #2 phillips head then heat the tip with a torch or sodering iron push down on screw driver hard (the screws are very soft) try to tighten the screw just a touch is all it takes to break the lock-tight loose then remove it remember to heat the tip for each screw push down hard and work slow or you will strip the heads