I'm helping a friend with a 1985 Hunter 28.5. The previous owner said to be careful and watch for movement of the compression post under the mast. This appears to be an aluminum post with mounting plates on the top and bottom. About four inches from the top there seems to be a seam where the post can be separated. I assume this is to allow removal of the post and also the folding table which slides down the post. Our question is what constrains the top part of the post from moving around on the bottom part of the post at this seam. I would assume that there is some kind of inner sleeve or shaft in the top post that slides into the bottom post. However we can't confirm this without removing the post. Any information of this (especially pictures or drawings of the post) would be greatly appreciated.
Thanks
Thanks