I have a 1974 RIC 4001 that I installed a Dipshot D-Tuner on back in the mid 90's. The D-Tuner (now called Bass Extenders) came with a Gotoh GB7 keywind and was a simple bolt-in replacement, no modifications necessary.
However, to keep the headstock looking uniform I installed additional Gotoh GB7 keywinds in the remaining locations which required enlarging the peg holes about 1/16". The original keywinds had bent shafts and the nickel plating was very tarnished. The GB7 keywinds were chrome plated and offered superior performance.
Recently I decided to restore the 4001 and to use the D-Tuner on another instrument. But the original keywinds had too much play in them due to the enlargement when I installed the GB7's. So, I purchased a set of new Schaller BM keywinds which had larger pegs. However, when I went to install the Schaller BM's the the holes, again, were to small by another 1/16" or so! The biggest problem after I enlarged the holes, though, was that the ferrules provided do not clear the truss rod cover on the E and D strings!
So, anyone considering messing around with stock keywinds be sure to do your homework and consider all the dimensions and consequences! Of course, any suggestions on my current dilemma (i.e. how best to resolve the ferrule clearance problem) are appreciated.
