Free Flyte tremolo is a well designed, quite sensible German manufactured tremolo. However lots of people can not use it. Couple of days ago I adjusted one strat. from 1983. First I used Ernie Ball Slinky 10-46 strings. With this strings the guitar was terrible. The reason is quite simply. The tail of this strings ( similarly to many others ) is bent back around a brass ring and twisted to fix it. It makes the tail extremely rigid. In normal case it is not a real problem. With Free Flyte tremolo it is disastrous. The ball end of the string is so close to the saddle nib, that any time when you push down the tremolo arm, the tail try to straighten, and the ball goes a bit backward, and the pitch goes up. This is not the equal at all strings. Some strings are keeping pitch, some of them not. Once goes out of tune, sometimes not. It is quite sucker. But if you realise that not all string goes up or down, you will understand that it is not the act problem of the tremolo, but it is the problem of the extremely short distance between of the tail fixing, and the saddle nib, which makes impossible to use all type of the strings. Fender has a so called Bullet type string. This string has special tail. There is a bullet on the tail , which somehow fixed on the string. Therefore the tail is quite soft. With this string there is no extra power to displace the tail, and strings will be tuned properly all the time. I bought a Super Bullet 10th. With this string the tremolo works properly. NO PITCH PROBLEM ANYMORE . Well, to adjust the spring tension is still a bit complicated. It is problem when you can not adjust the tension by the screw on the top. In this case you must move the spring fixing plate under the scratch plate. Otherwise the rule of the setting is quite simply. You need only one piece of 3/32 hex key. First you tense the spring by the upper adjusting screw ( 3/32 hex key, 8 complete turn clockwise ) You raise the back of the tremolo plate and lay the 3/32 hex key between the tremolo plate and the guitar body. You tune up the guitar, make all settings. You remove the hex key under the tremolo plate. You loosen the spring by turning the upper adjusting screw contra clockwise as far as the tune will be okay again. If you are lucky that will be enough, if not you must go under the scratch plate. I hope this will help for many user. Sorry for my bad English.