Platform -
Consists of two 3/4" pieces of plywood glued and fastened together. I drilled holes through the base plate and the metal plates at the corners of the mobile base, and secured everything with 2-1/2" hex bolts, hex nuts, flat washers and lock washers. I then mounted the drill press to the base with 4" through bolts, flat washers and hex nuts.
Drill Press Table -
The table is 14" x 36" and is 1-1/2" thick. Attaching the table is quick and easy with 5" toggle clamps (BusyBee Tools). The clamps are installed on cleats and hold the auxiliary table firmly to the drill press table. Whenever I need to adjust or remove the auxiliary table, I just release the clamps and slide the table off the drill press.
I cut out the center piece in favor of a removable insert. It's used to back up the workpiece to prevent tearout when the bit drills through, and can also be replaced when it gets chewed up.