Dear Pure Drive users, I've been searching for a racquet with some inherent power. I have tried many tweener frames and found the Pure Drive to be the best of the bunch. My issue has to do with arm soreness after a long 3 set match using a PD demo strung with Babolat Addiction 16g at 58lbs. In your experience, does that arm soreness go away as I become acclamated to the frame or will that persist? Also, can I even consider using a soft co-poly like MSV or Weisscannon strung at 45-48lbs? Finally, the 4-3/8 grip felt big to me even as I use a 4-3/8 Prince Graphite, so do you suggest going down to 4-1/4? Thanks for any advice you can provide.