#1
If i keep the same gauge and brand of strings but go from for example nickel coated to the ones with the coat the prevents breakage will i have to readjust my floyds bridge
Ibanez RG270
Switch Wild I
Strat Copy

ProCo Rat Vintage RI
Dunlop Crybaby
Ibanez FZ7 Fuzz
Danelectro DJ-6 Phaser
#3
Most likely not. Some strings stretch more than others, but I doubt you'll need to adjust.
WTLTL 2011