I've been stringing for a player on the ferris team for the past 4 months. He's a big hitter a before a month ago has been has always broken the mains in the center of the racquet in a Black Magic / Babolat Nvy hybrid in a Yonex RDIS. However over the past 3 weeks he's been playing some big servers and frequently has been framing a lot of returns, breaking the mains on the top of the frame in the same place almost everytime. I've carefully looked at the grommets and can see no damage or sharp edges that would cause these breaks. I wanted to know if using power pads could help reduce these breaks without changing the way the frame plays to much? Any other suggestions besides tubing would be great (Already tried it broke where the tube was).