On my LE-2, which has the DFS tremolo, I use strings that are slightly heavier on the lower end, .01-.48 ( and sometimes to .50).
For my guitar to stay in tune, the tremolo is not level with the body, it rises up and is higher in the back. I would like it to get more parallel as this would give me better and proper performance and lower the action on the high notes.
Do you think the solution would be to add more springs on the tremolo? I've also seen pictures of a special spring that some people use in the middle position? What's that and what does it do?

Thx,
Alf