Gotoh SDS510 HAPM. Height Adjust Post, and Magnum Lok. Best Kluson style gears they make. $85-$90 USD Just Locking x Nickel are.... MG $71.69 http://gotohtuners.com/Gotoh/Gotoh-Products-SD-Series.asp I used the SDs on a high dollar LP build and love them. SD are made for 3 x 3. SDS 6 Inline. 510s are their best Gears. I used the SGL510Z 6 years ago on a Strat partscaster/ HAPM.