Just make sure that you remember to put in some "T" track , two pieces running front to back to carry the fence, one parralel to the fence for a mitre slot.
Jacko
ps, I would use something manmade, dead flat and stable. My table is 45 mm of MDF with a laminate top, waxed occasionally. Just my 2 c's worth, understand that you want to iuse what you have already created. perhaps you could find soething else to do with it?