Hi all, I’ve usually found the traditional 6-screw tremolos on these Strats can be set up decent right out of the box. I have one that giving me some trouble. I’ve done some modding to this one - Bootstrap pickups, replaced switch and pots with better, full copper shielding. It sounds fantastic but I can’t keep the thing in tune. I float all my Strat terms with three springs so they will pull up about half a step. On this one, when tuned up properly (yes, 2.5 winds per string - not overlapping), I depress the bar and release it and the low e returns a half step sharp. The low a little less sharp and so on for the rest of the strings. I do some moderately aggressive bending on one of the strings and only that one string returns to proper pitch. Pulling up on the bar doesn’t seem to bring everything back into tune, like you would expect. Here’s what I’ve tried: New strings (9s) - well stretched out Different brand of new strings (10s) - also well stretched out Replace nut with Tusq XL self lubricating nut (original was plastic for sure - I think this is a 2012 Strat) Installed roller trees, but the low E and A don’t use a string tree anyway Tried 3 different sets of saddles -original cast, steel block and black Tusq string saver self lubricating saddles. String savers were on another guitar, but I figured I’d try them Oiled holes through the bridge plate Replaced the three trem springs with high quality WD springs. The tremolo doesn’t seem to be catching or dragging on anything that I can see. All that’s left to try is switching the bridge (I have MIM standard bridge that will drop right in - I’ve upgraded Affinities to these before) and the tuners. The roller trees, Tusk nut and Tusk saddles had absolutely no positive impact on tuning stability. I’m thinking the tuners are likely the next course of action but I don’t really have any decent drop-in tuners on hand at the moment. Any other thoughts? Am I missing something obvious?