Ok, title is a bit peremptory... But if I play with multis in my racquet, I can notice a 2lbs difference in tension. With polys, I could do a blind playtest with racquets strung at 54 and 59, and wouldn't feel the difference. Did some of you also notice this? Maybe it depends on which poly you use. I use mainly RPM Blast 18 gauge. I'm wondering if it's some kind of general rule -- that polys can be strung in wider tension range without making a noticeable difference in your feel. Agree or not?