Critical But Stable - Tremolo Workshop

Verdict
 

Remember that, with a Strat trem, everything affects everything else. Once the bridge height and spring tension have been set, you will almost certainly need to re-adjust the height of the string saddles and re-set the intonation.

Whenever making adjustments, you need to re-check everything else. Essentially, you should expect to gradually hone a Strat setup rather than nail it straight off. If you can work methodically and remain patient, there’s no reason why your trem-equipped Strat can’t play smoothly and stay in tune just as well as any other guitar