I'm testing different strings, Luxilon big banger original 16 is one of them, it says in the pack that should string 10% less tension than usual, any comments on that? I usually string with syn gut @ 64 mains x 63 crosses as my coach says I hit hard and with heavy topspin but I usually get the strings (specially mains) moving around after 1 hour of play which results on lack of control.