Sorry to overlap on so many posts about when poly strings go dead, but I seem to play my best tennis (I'm 4.5-5.0 aggressive baseliner) between 10-22 hours of Big Ace 1.25 strung at 54 on my Head Mid+. The string is supposedly dead (it hasn't yet moved...usually breaks at around 22 hours or so), and has lost elasticity and tension. I guess others would tell me I might be putting my arm in danger. I'm not that experienced with analyzing string. I have tried "better" quality poly (e.g., Black Code and Pro Line II), but I can hit big and with more consistency with Big Ace. Just curious, why would I play my best tennis when the string is supposedly dead? I hit through the ball pretty well on both sides...a fairly flat ball...is it simply that I get more control hitting a penetrating ball with dead strings? Thanks in advance.