Last night, we're were working on my son's 500 XC SP. One of the chores was replacing HiFax. The first one took probably 30 minutes of pounding to get it off, we flipped the sled over to do the other side. I was having a problem pulling the screw out of the front, so my son heated up the HiFax with a heat gun, thinking it would loosen it up a bit. Holy Mackeral, it came off so easy, pulled it right off in seconds.