Old Epiphone Superstrat in to have a DiMarzio Pickup installed to replace the original which seems to be faulty and to be restored as much as possible. The Kahler trem was a different radius to the fretboard and proved difficult to match up even with 3 shims, the low E was still a little high but much better. I need to add two shims to get the action where it needed to be and replaced the missing locking nut.