Yeah I think I will end up replacing the bridge, its definitely a cheap copy and it doesnt lock which the local guitar shop told me is perhaps why it doesnt stay in tune. Its not as expensive as you may think, here I can get an official one for $170 New Zealand, about $100US or slightly more. And sorry about the confusion but what i meant by:
1)
severe tuning problems, when i pull the whammy bar up, every string tunes up about a whole half step, and vice versa when i pull the bar down,
2)
even when i just do a full bend on a string the bridge will move and detune the guitar, im wondering what would be the origin of this problem?
1 - lol yeah i explained this badly what i meant is when i pull the bar up, every string goes up about half step, and then when i release it stays at that height if you get me and if i push the bar down every string goes down half a step or so and stays there when i let go and continue to play, and
2 - When i said bridge goes up i meant that the movement of the bridge going up detunes the guitar when it returns to the flat position e.g i bend the string, bridge goes up with it, comes back down, and then i keep playing and notice that the guitar has now detuned slightly....