There is the slightest of gaps, maybe 1/32" at most at the back of the eye.
The kerf was about a 1/16" at the point of wedging. The kerf was about 3/4" up from the bottom of the head.
If I rocked the head I could get it off, but it to about 30 seconds to working the head off to get it free at the end of fitting. It did rock back and forth.
Finally got it down far enough on the shoulder for what my eye liked. I set the head by hitting the butt of the handle 10 or so times with a 2x4. Left some decent marks on the 2x4. I cut very little of the nub on top of the eye. Just scribbed it to the shortest point.
Yes the pitch changed as I drove the wedge. Used a rubber mallet. Thought it might have bottomed out in the end but the last few times it moved I needed to hit it 2 or 3 times to get it to move. My gut told me the pitch would rise one more time before it was soild. Hit it like 8-10 times. Wouldn't budge.
It's been sitting in BLO just covering the bottom of the head for over 24hrs. Might get a chance to pull it late tonight. Might be tomorrow. Stupid work. (Actually I really like my job.)