I started installing my Heaterz this weekend. Removed the old grips with compressed air and found that I had to grind down the lip on the bar end side of the throttle sleeve to get the heated grip over the sleeve. Not sure what to do with the raised part on the control end of the sleeve. Have you guys been grinding that off as well? Looks like it might weaken the sleeve too much. I guess I could also cut the end off the original grip and cover the exposed piece of the nylon sleeve with it.