I use a. Babolat roddick PDF with 1.10 msv focus hex at about 50lbs. The strings last just about 4 or 5 hours before giving me awful te through my forearm and lower bicep. I now have my own stringing machine and think it is best for me to swear off polys. I love the msv so are there multis comparable to polys in terms of spin and power. Any suggestions are appreciated.?