Re: Changing tuners
I've had good experience with installing Grover 309 and Rubners (and they both come with worm under or over options). Stewmac.com has schematics so you can see if the 3 screw spacing matches. You can probably email Rubner for same. Three issues i had is with what i think are called metric bushings that come with the Rubners vs the Gotoh bushings that were installed on the Kentucky that have larger diameter openings for the tuner posts.
Also the hole diameter for the bushing varies: 8.23mm for grover, 8.58 for Rubner
On another mandolin the tapered peghead appeared to not have been drilled exactly, and the tuners were binding, so i'm having those holes filled and redrilled (about $100 of labor, well worth it). You can search for threads on tapered pegheads if that applies to you
http://www.stewmac.com/Hardware_and_..._Machines.html
Kentucky km900
Yamaha piano, clarinet, violin; generic cello;
a pedal steel (highly recommended); banjo, dobro don't get played much cause i'm considerate ;}
Shopping/monitoring prices: vibraphone/marimbas, rhodes, synths, Yamaha brass and double reeds
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