OK, two weeks and two rounds later - none the wiser.
Rounds start just great. Straight shots, optimal distance, center hits, pars and bogeys. Perfect for me.
But then the swing with the 3w and 3h slowly falls apart from hole 4 and on. Tolerable 10 yard pushes off the tee first, by hole 10 I hit up to 50 yard push slices and off-center hits.
It translates to the longer irons with fat or off-center hits, too. Fat is bad, off-center is 15 yards less distance,...