I completed my survey on the red number prototypes yesterday after finally losing the last of the prototypes. I did not notice a lot of difference between the prototype and the Pro V-1x, though I did seem to get a bit more distance from the prototype on most shots. It bit really well, more than I'm used to, even on chips and short pitches around the green. One of the three--the last I put into play--seemed much harder than the other two, but performance was pretty much the same through the sleeve. Like, Doug, though, I was able to tell Titleist that the prototypes don't float.