Are you talking about the new 2012 version ? If so, I will give you some tips. Get the Kirschbaum Proline X. It works best and sweet with PDR or PDR Roddick 2012. I was using the RPM blast and Big banger sometimes but they didn't work as well as Proline X.
Babolat Pure drive 2012, 55 lbs, Kirschbaum Proline X / X-1 biphase. Nalbandian backhand and Nadal forehand.