if you're using the "classic" strat bridge, try mo i-adjust yung saddles para mawala yung buzz. also baka lubog na yung nut ng aratig mo... kung hindi rin lang shread ang tugtugan mo, i suggest na taasan mo yung saddles sa bridge ng strat mo bro. ika nga ni Jeff Beck, "the higher the action, the heavier the gauge, the better the sustain!" ever wonder why SRV got that killer tone? he uses a gauge 13 on his axe & the action is like 1/4" fm. the fretboard... allen wrench lang katapat nyan bro... good luck!