Despite the lamination (my bench top is 4 layers) MDF is not self supporting. Just as in all those sagging router table threads we've read, your top will need to be well supported. This assumes several contact points between the base and the top (rough diagram for example only, I'm still having my first cup of coffee). I understand the desire to avoid metal fasteners but, I just ran a half-dozen 1/4" lag bolts up through oversized holes from under the supporting ribs. You could use dowels and receiver holes in the same positions to avoid the metal fasteners.
Last edited by glenn bradley; 12-19-2014 at 12:22 PM.
Any sufficiently advanced technology is indistinguishable from magic.
- Arthur C. Clarke