I've been enjoying playing my Head IG Speed (16x19) MPs with Head Sonic Pro 17. I really like the extra spin on the ball these strings give me. The problem is that I feel I need to restring my racquets once every two weeks with this string or the string becomes unplayable for me (poly goes dead - strings begin to move). FYI - I don't break strings anymore (as much as that hurts my ego). I'm watching Clijsters play right now and that got me thinking - if a WTA pro can still play with natural gut, why can't I? I'd expect that a natural gut job would last me at least six months, which would make it even more cost effective than stringiing poly. And natural gut would help protect my tender elbow while retaining its tension. So, should I consider making the switch to natural gut? Will I miss the spin I get from poly? What would you do? Thanks for your thoughts!