When I use a long worm dampner or astrong viration dampener like head smartsorb or babolat vibrakil and hold the racket from the top of hte handle and bump the top of the racket frames head it makes a nasty vibration. Why is this My friend owns this racket and his does not do this at all. His feels solid and nothing weird happens. When I take off the vibration dampener this doesn't happen, but then when I hit the ball a bad noise comes that i dont want. With the dampener, it feels solid except if i hit outside the sweetspot a bad buzzing noise comes. I just got my racket yesterday brand new and it doesn't feel right or as good as my friends. Same string job, same tension, same overgrip too. Is this poor quality control and a defected racket?