This old Strat trem has been set up as recommended by Carl Verhayen and the spring claw has ended up at an angle. It doesn’t look pretty, but this Strat really stays in tune and the trem is very playable
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
7. Critical But Stable - Tremolo Workshop