I'm playing with a textreme warrior 107T racquet ( NTRP 3.5 player ) and I've tested plenty of string setups from full multi to full poly and hybrids. It turns out that at my current level a hybrid setup helps me achieve great depth with my shots, forgiving contact, comfort and easy access to spin. I'm using Head fibergel power 16 in mains (26kg) and Luxilon Adrenaline 16 in crosses (24 kg). The setup helps me a lot but it doesn't last long. After about twenty hours of play the mains get notched pretty hard and their elasticity and tension seems to fade away as they move all over the stringbed. What I also notice is that after about twenty hours of play my shots start getting flatter and I get way too much power. I usually restring every two weeks since I play about 2 hours a day. I was wondering if I could get something more out of my strings if I switch to a higher quality multifilament main and poly cross. During my search in TWU string tool I found some data that I could not explain and I wonder if anyone could help me. What I'm looking at is for : 1)A multifillament with good tension maintenance and as low as possible string-to-string friction. I found the Wilson NXT string having good tension maintenance based on the data but the different varieties of the string seem to have a completlely different string-to-string friction levels. For example Wilson NXT 15L seems to be much more slippery than Wilson NXT 17 based on the TWU data. Also the variations of NXT such as NXT control, NXT power, NXT tour seem to also have a wide difference in string-to-string friction when compared to each other. Could it possibly be that the data are incorrect or am I not getting something ? 2)A poly with lower than 200 stiffness (to prevent too easy sawing of the mains) and very low string-to-string friction. Contrary to the pattern I saw in NXT in the multifillament category where thicker gauges seem to be more slippery, it seems that in poly thicker strings have more friction which also puzzles me. EDIT: Seems I posted in the wrong section, should be moved into Strings sub-board, my bad.