all ive ever played have been guitar with whammy bars on them. for 20 years, once you know, then its really pretty easy.
this is a must in order to have your strings in tune everytime.....
1) all sides of the base of the tremelo must be level. front back and sides. make sure you pick ou your guitar and eyeball it as if you were looking down the barrell of a gun. If you cant get the sides level, then look at your springs. make sure they are on straight, no sideways crap, make sure theyre hooked on to the same hook straight accrossed form each other. If you use heavy gage strings you may need to have 4 springs, if you only use like 9's and 10's then 3 should be fine. you do all this by loosening or tightening the springs by turning the screws with a screwdriver for the back and the front is leveled by the mounting screws that you will need to adjust with a allan wrench.