Installed the Grover 406c's on my SECU24 last night. Super easy, but doesn't come with explicit instructions. - Remove strings. - Use a 10mm wrench (I used a socket wrench) to unscrew the nut. - Use smallish phillips screwdriver to remove back screw. - Look at Grover and PRS nuts, screws, and washers and decide which you want to use. They seemed near identical; I went with the Grovers for consistency. - Seat the tuner, and screw back screw in most (but not all) of the way. - Put washer and nut on, tighten. - Finish tightening back screw. - Repeat all above 5x. - String it up. - $Profit!$ More importantly, I know some ppl don't like the smaller buttons - so here's a side-by-side for your decision needs. Stock on the bass side, Grovers on the treble. Personally, I don't mind the size (I felt the low-E tuner was awfully close to the headstock as you turned it) - I'm just waiting for the more spade-y shape to grow on me.