My action is a bit bust on my strat, how do i fix it? do i play with the screws on the bridge which tightens or loosens the strings? or shud i get it setup by a shop...

What exactly do you mean by "a bit bust" Is it too high, too low?

You adjust the string height on a strat by adjusting the grub screws that go down through the saddles - there are loads of tutorials out there - just google it!
My roller bridge has flathead screws. You're mean.
Owner of the Murder, She Wrote club
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Oh, finish the guitar, then spill whiskey and coffee on it. Lock in dank basement for several years, enjoy.

don't forget feces. i always get that on my axe somehow.