I don't have pics but...

We have a 4x8 kit built CNC from Build Your CNC (??) at our MakerSpace [URL="http://www.slomakerspace.com"] It holds a 49"x97" sheet of mdf. I used a biscuit cutter to cut slots in the edges of the mdf about every 10" then inserted 2" fender washers in the slots and screwed the washers down to the main table.
Screws are totally out of the way of the bit.