Played a match indoors yesterday, and this was the first time I had ever used a poly string that I had strung myself at the 10 hour mark (string age).
So anyway, I couldn't keep the ball in. I was using an IG YT Prestige MP with BHB7 17 @ 52 lbs. It was a rocket launcher!
So my question is: as poly dies, is it supposed to get more powerful? No amount of spin I put on that ball kept it in. 90% of my shots sailed long. We only won our match because my partner stayed more consistent and dug me out of trouble.
other than that, there are no "classic" identifiers of string death. The strings weren't overly stiff, there wasn't a lot of string movement. The only symptom was way too much power.