Join Date: Dec 2000
Location: A Mile High (USA)
There is an item available called the TremTool. It's a single-piece wrench with (2) heads (shaped like a "T"). One side fits the locking nut, and the other, for some reason, fits the bolts that hold the locking nut onto the neck. That wrench also fits some Schaller locking nuts (i.e. the Spyder from Fender HM Strats).
The holder attaches to the back of the headstock with with 2-way tape. Easy to remove, and no drilling. The Gotoh wrench sets available through Ibanez Japan do require small screws to fasten to the headstock, as do the Schaller sets.