has anyone ever opened up the stock can on their g1? there are three allen bolts on the back of the pipe that i am dying to take out to see if i can remove some baffles. they are tack welded in place, so i dont want to start grinding them until i know i can gut the pipe from there. are threre easier ways? this is my biddies bike and he does not want holes drilled in the exterior of the pipe.