Re: ZR tremolo problem
I think Rich's site clearly states:
Leave the lock open.
Stretch -> tune (with head tuners) -> stretch -> tune and so on, until the strings are fully stretched.
Then you lock.
Then you tune again using finetuners.
Try a few stretches if you are still OK.
I am using Rich's method since I got my 7vwh from him and my tuning stability is awesome on all my guitars.
Stretching is really really critical guys and the method that some people use: playing and doing a few bends, is by far not enough.