As far as I know Darren, Bloo duke is the first to get the head conversion this side of the "pond". The 966 kit was the original plan, but it's a little more race focused, leaving the skirt a bit thin.
Although Bloo gets some serious track time, she still does a lot of road miles so reliability was important to.
MBP reckon that ultimately there is little difference between the 22cc's and they actually run 944 in their own race bike.
Build it, race it all season and strip at the end. They haven't even had to do the valves.
Now a 1000DS with these heads on..................that would be fun
