In the middle of my first guitar rebuild and I've got a bit stuck with remounting the bridge humbucker... the mounting ring is tapered and I have no idea which way the taper is supposed to go. This is a new ring, but the one that came off the instrument (which I should probably mention is an old Ibanez SuperStrat type thing) tapered as well, of course I didn't notice this until after I'd taken it off and removed the humbucker from the ring!