instead of tighteneing the springs...take the high e off of the tuner so its only hooked to the tailpiece....at the front of the saddle is a screw with a hex hole...loosen it and move thwe saddle forward, this makes th efloyd rose able to stand 11 guage strings :)
DONT FORGET TO TIGHTEN IT BACK THOUGH!!!!
now you still have the sensitivity and tone, unlike when yiou tighten the springs...when you get a 9 guage e string the tension will be toooooo tight and youl have too losen it again, so my way is more sensible :)