Posted 22 April 2011 - 07:21 PM
I bought the Driver with the I-mix head so I can change the shafts. I have both the 9.5 and 10.5 degree tour heads. After testing/owning several shafts I settle on the 63g Diamana Blueboard stiff. The head performance is pretty hot off the face, I wouldn't call it cannon. The sweet spot is rather large and more towards the toe. I found the left/right dispersion to be pretty tight (5 yards) with the Diamana Blueboard shaft. The Diamana shaft works well with the 9.5 degree head. I have a 100 mph swing speed and my drives carry 250 yards with this combo.
I think there are definitely hotter drivers but the availability of shafts for the driver head makes this a great buy if you are a Callaway fan since they have abandon the removable shafts on their new line up.