I've been using the Prestige Mid (Microgel) on and off for about two years. It's fine. Whatever. But it seems like every time I try a lighter stick, I notice some twinging in my shoulder rather quickly. I actually bought a APDGT about a year ago because I loved the spin I could get while I demoed it and had to sell it after four months. I even strung it with 17 gauge RPM Blast at the very bottom of the tension rec; didn't help (multis or syns are not an option for breaking/financial reasons). Today, I was demoing a prestige mp (you-tek), and holy smokes, the thing is only about a half ounce lighter than the mid, but there again, I noticed some shoulder/elbow discomfort. I've read a lot of good things about the Pure Storm GT and would like to demo it, but it being a hole ounce lighter than the prestige mid I use, I can already see where this is going. Why is this? Is it because you swing harder with the lighter racquet thus creating more vibration? Clue me in. It seems counter-intuitive, like the heavier racquet would cause more arm problems, but that's never been the case for me.