I have a 4" X 4" Apitong Compression
post that I used on my Ferro
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.