Hello, I would like to know what is under the floor pan on my main bulkhead (specifically compression post part of the bulkhead) of my M-23. This may be a question that only the builder can answer but from what I have read the wood bulkhead should go all the way to the hull and be tabbed in with fiberglass strips with the compression post for the mast tying into the keel. Reason I ask is that my compression post and the corner of the tabernacle right above it are about 1/8" or 1/4" shoved down. I had noticed some damage to the floor pan over the winter and thought the center board may have shoved up on the floor, but as it turns out the floor around the compression post and one corner (only) of the mast tabernacle are lower than they started life. Not by a lot but clearly, lower. I cannot picture what caused the damage but I can clearly see stress cracks around each of these areas (tabernacle support on the cabin top and floor in the cabin) that indicate some damage. I cannot see below the floor pan without cutting the floor but I was hoping someone could tell me for certain or make a really educated guess about what I will find and how the compression post which is all wood (of what I can see of it) on the M-23 versus tubing on the M-17 could have moved down without something that should have been very structural at the base being crushed. I will repair the issue but will probably put it off until haul out. I may perform exploratory surgery to see what is under the floor pan soon. Very interested in any information folks may have! Thanks in advance. Cheers Robbin