I'm building a 4x8 machine out of mostly wood. From my experience, no wood (or wood product) is hard enough to mount any metal hardware with screws or bolts. The tightening forces are more than enough to crush the wood.
My linear rails are mounted to phenolic plates. I epoxy the phenolic, and CNC machine it flat with a straight ledge.
I wouldn't try to run phenolic on a jointer, unless you have carbide knives. Preferably a spiral head with carbide inserts.