Anyone have more info on this racquet? http://www.flickr.com/photos/34097936@N06/sets/72157631593281070/ It appears to be very similar to the regular PS85, but the area just above the grip is slightly more narrower. The other parts look similar. Might be slightly thicker than 17mm. 17.5? Did Sampras actually use this racquet? Were they available for sale in retail stores?