As a bit of a tangent, I recently sold a PA23 to a girl who's normal string setup is VS Touch 1.30 mains / RPM Blast 1.25 crosses, and I wanted the racquet to have a fresh string job for her, but I didn't have any natural gut on me at the time, so I used AK Pro CX 1.30 in its place, and she loved it. Actually, she liked it so much that it's become her alternate setup, and the one she goes to in more wet conditions especially. Also, I also noticed an insane amount of snapback right off the stringer, due to both AKPCX and RPM being silicone oil coated. Very nice combo it would seem.