New mid-size Oyster bracelet swap with 2007 model?

[fastskater]

My girl's 2007 mid-size never could be adjusted properly to her small wrists despite multiple attempts at more than one Rolex dealer. The clasp refuses to lie flush against the underside of her wrist, it juts up at the connection point, catches on things occasionally and opens up, slipping precariously off her wrist more than once.

I'm wondering if anyone knows if the new 2009 Oyster bracelet models w/new clasp, Easylink, etc. can be substituted for the more traditional bracelet on a mid-size. Any insight is appreciated.