I have not, but I am interested in doing so. Awaiting an email response from Vantage..... I have hit with a few OS frames lately and for the most part, have liked them. The 300G OS has been great, although mine is considerably heavier than listed. I have been recovering from a shoulder injury and gotten some good advice here. I have gone a little lighter, bigger, but still flexible. Still recovering and playing more soccer than tennis, but wanting to find the feel of my Vantage 100's in a slightly lighter and bigger frame. My 321210 Vantages sure are hard to beat though. Being injured sucks!