Anybody have experience with it ? I have no manual, but assume I have to take out the allen bolt at the bottem of the fork (?), but can't get it out. The cartridge is happily turning with the bolt when I try to loosen it. I have removed the oil, put extra pressure on the fork by compressing it with a strap, and used an air tool. Still the b**** won't come out . Anybody have a golden tip ?