Re: Edge pro tuning problem. Is the EZII better?
Replace the trem with a new trem, evidently without even inspecting the original. [the worst advice of course]
The springs are binding on themselves.
The bridge is too low in the rout.
Some of the "check this" was OK advice, but not in this case. If I have to beat a dead horse.
The problem is, dive all you want, it returns in tune, pullup, it returns sharp, until you dive again, back in tune. I believe we already established this at the start of the thread.
In which case, this is the common "no lube", or combination knives a little too fat, and stud mod cure I've fixed 500 times. Everything else reacts differently. If the trem is binding it's never going to return in tune perfect, pullup or dive, if the anchors are lose then return is erratic and unpredictable. If the nut is lose the symptoms are reversed, etc.
Now the horse is thoroughly beaten.