I just got a stringer. Until I found a reference tension, my normal tensions were just way too tight. My stringer is nearly 10% tighter than the jobs I'm used to getting. While 10% doesn't seem like much, it's quite noticeable and drastically affected my shots. On the same racquet at 58lbs, I had to swing out for the ball to go beyond the service line. A day later at 52lbs my 3/4 swings send the ball near the baseline. (And NO, it isn't because I did one job completely different. This is about my 10th job and I'm stringing them in about 45 minutes. I'm addicted!! :grin: ) Some here will point out that drastic tension changes alone will only increase or decrease the velocity of the ball by something like 1% or so. While that may be true, where it lands on the court is not 1% deeper or shorter. I want to better understand what happens here (trampoline effect, dwell time, etc???) that causes major changes in depth of the shot. Can someone help? Please don't reply with conviction if you don't know what the hell you're talking about, haha. We have enough subjective BS on this board anyway. Thanks!!