Originally Posted by: R. ShackleferdHere's a picture of one. Your hit it and then place the bottom on a hard surface and it resonates a tone. The allen wrench is either for your neck rod (don't go turning this just to see what happens), or perhaps to raise/lower your action (string height) on your bridge saddles.
Ok I don't have one of those then.
Glad there's someone older than me also. :D
and thanks again. :)