A little background. I have 2 Vantage 90, 12pt HL, 340 gram. String with Unique Big Hitter 17 at around 55 or 56 lbs. The last 4 times I break string it pop on the top frame grommet. 2 from mishits from the top of string bed, but 2 break when I hit the sweet spot but it still break in the top of the frame grommet. With Unique Big Hitter on my other frame, PS 6.0 85 or Prince 03 Tour, it last more than 1 month, but on Vantage 90, it usually last 2 weeks. 1) Is this something wrong with the grommet too sharp and it cutting into my string. I just got the Vantage for only 2 months. 2) Any Vantage users have similar problem? 3) My guess could be the string too. Note: I not flaming Vantage, just a question? I love the racket.