Maximum Drop w/o New Struts . . . .

[woof]

Just toying with the idea of lowering springs and wondering how far one can go without having to replace struts and stuff? I know the TRD 1.2" must not require anything but installation but what's the lowest anybody has dropped w/o having to replace any other suspension parts?

Thanks.

PS. Are TRD springs effective? Do they pretty much flatten out the body roll? I already have the TRD rear sway and need another tweek to make it right.