I got a Samick strat style guitar. But when I used the trem I found the D String going mad.

You can see the guide is broken. I got given a new bridge, hoping to just swop it out but I wasn't that lucky, they were different sizes. Even the guides had smaller screws which meant I couldn't easily switch those.
I ended up filing them open more, and even filed the height down to give the screw more grip on the plate.
The new guides have a string through design so I don't have to cut the ball end off.
So now it worked out, after some elbow grease. It's a nice little guitar, now it only needs new pups..
There is more info and pics on my blog