I have a 4" X 4" Apitong
Compression post that I used on my
Ferro cement
boat about 28 Years ago. It's worked fine and looks as good today as when it was installed. I had a furniture factory, one of my machines was a great big industrial 30" inch planner, The Apitong was very rough and I wanted a smooth finish, I couldn't believe how hard that
wood is, that planner sounded like a machine gun... just taking a skim cut on all four sides ate the blades. I had to send them out for sharpening and finished the job with a belt sander.
Lew