i am using a prestige classic mid. i'm not a string breaker AT ALL. i've been using duraflex 17 for about 4 or 5 months and htey just started peeling. i usually string at middle tension. i want to try gut for once (especially since i play a lot in the summer) about how long does it take before babolat gut loses its tension? should i go with full gut or hybrid it with the duraflex 18 that i have right now? thanks.