Hey MLP, I have a Gibson CS-356 (can be seen here: http://www.mylespaul.com/forums/other-gibsons/146021-gibson-custom-shop-cs-356-appreciation.html#post2789109) with stock Grover Rotomatics. I want to upgrade to locking tuners because I look lots of crazy bends (on 12s!) and because changing strings is sometimes a hassle on the fly (especially with 12s, they don't like to stay around the post while winding). I have TonePros Locking Kluson tuners on my 1980 Gibson Les Paul Deluxe (don't worry, they dropped right in) and love how they work. So I was wondering, should I go with: Grover Roto-Grips, which function very similarly to Sperzels - they'll drop right in. $80 or TonePros Locking Klusons, which will drop right in, but I'll have to drill wholes for the top screws. $60 I'm leaning toward the TP Klusons. I know that I'll have to drill into the guitar, but I'm never going to sell the guitar anyway, plus they are $20 cheaper. Anyone have experience with both? Any preferece? Thanks guys!