This shock has a rebound adjustment ring at the top of the shock can. There are two little set screws at 180 degrees on that ring. Do those have to be backed out in order to set the rebound speed? I ask because I don't want to score anything by not loosening them or undo anything by loosening them. It surprised me that I couldn't find any schematic or user guide that addressed the use of those screws. Thanks. Oh, and the other problem if I do loosen them and then set the ring to certain clicks, I can't retighten one of the screws because the frame is in the way.