i just picked up a used 1996 hamer slammer series diablo with a licensed floyd rose. one problem though, the FLOYD WONT STAY IN TUNE! i've ruled out that it's nut a locking nut problem, i've stretched the strings, i've made the bridge is parallel to the body, it still simply wont stay in tune when i whammy. due to this, i blocked the springs in the tremolo cavity for now so that i dont have to worry about it, but eventually im gonna want to use my trem. any ideas anyone? i've heard that i should lubricate the knife edges, does anyone know how to do this?