So im using the new 2012 Wilson Prostaff blx 90 6.1 tour. the best and perferred set of strings i use is the wilson champions choice. i do nat gut in the mains at 60lb and the lux rough on the crosses at 55lbs. my reasons for those tension is that my philosophy is that if the crosses are looser, the mains would snap back easier creating more spin. anyways, these would last me for about 4-6 days of hitting at about 1.5 hours a day. i still like them but of course cost is the issue and i would only buy a set once in a while if i have extra cash. i alternatively substituted the nat gut with a multi. i still kept the lux rough in the crosses at same tension. i also like multis due to the comfort and power. but i have gone through literally at least 5 sets of these and they have been breaking within 2 hours! that is a waste of at at least 15$ a day? twice, i broke two sets in a day! the multis i was using were x1 biphase and nxt both 16G. basically, this hybrid setup doesnt even last half as long as the nat gut setup so i was wasting more money!! and to be honest, playability wasnt even as good as the champions choice set. so what do you guys think about the string setup that is making them break so easily? tension? multi main and stiff lux rough poly not a good match? from another perspective, im currently using a full set of nxt tour and they are fraying after 2 hours of hitting. am i just a hard aggressive hitter? i play with full western and hit with alot of pace and spin. i have been playing tennis for a little under 2 years (started with no skills and never had a personal coach) and was not really a string breakers before (though i was usually using full polys before). opinions?