Legitmate case of diminishing returns.I don't think bigger would help. I built a few of the old illegal 500cc component drivers and they aren't any longer off the sweet spot or any more forgiving on the toe/heel shots. I hit smaller drivers just as well as 460cc units since most of my contact is near/around the center of the face. My problem is the face isn't moving very fast.................
However, actual results isn't what golf club manufacturers marketing systems are based upon.