Check the cabin top area above the compression post for sagging. Not a big job to rebuild if rotted.
Also, (and more importantly), check the mast step in the bilge. Many Hunters (including mine) suffered from rust rot of the step and water degradation of the sub-flooring above the step. Repairing that would be a big job, but doable. Check the archives for several threads on this subject.
I would do the above before digging into the compression post.