Typhoon I had 4 NB heads this summer,(still have 3 ), including the late addition of the Ball Buster. All were not impressive as the originals. With the original head I had, it was probably the best driver I ever had. Yes, I did sell it off, but only to finance a different project. These newer ones just do not seem any different than any other 'cheap' head I might have, and they all come in with closed faces. The new NB BB was a huge disappointment, but I was expecting that. No way to prove the COR is 'too' high, and I suspect they(all companies) only just say that because they did not send it in for testing. If I wanted to put out a "hot" head, I'd make damn sure it was, at the foundry, and send it in for rejection!! Everyone would want that head; it was proven to be 'too hot'!