One of the questions is, did the mast step go down, or did the bulkheads go up? This shot shows the small clearance between this bulkhead and the hull indicating that the bulkhead did not go up but the mast step went down.
In looking at the paint marks on this bulkhead and the picrures of Eventide, it seems clear that the mast step used to be up where I put the dashed line. One obvious clue are the screws that go through the bulkhead and down to the mast step. It is interesting to see that the mast step has not moved relative to the bulkhead that was installed 9 years ago. It is possible it has moved 1/8 inch, but that is the maximum it could have moved in the 9 years since August 1997 when this bulkhead was installed.
This shot from in the head shows the screws that used to hold the bulkhead to the mast step and the screw holes they used to go through. Clearly either the bulkhead moved up, or the mast step moved down. I think the mast step moved down.