Want to make the transition to gut. Looking for some suggestions on brand and tensions to string. 3.5/4.0 player. Mid 40's so looking for better control, some power. Dunlop BIo 400 racket. Been playing with full beds of multi (multifeel 17, PPA 17). Should I stick with 17 gauge string? Looking at mid price guts? I string my own rackets so also looking for something I can string without much fuss.