Final Install
With the help of a couple of fine folks on here (Mike, Robert), we lifted up the drill press and slid it into the mobile base. Couple whacks with a sledge hammer, and it fit like a glove. We got two 1/2" carriage bolts very securely mounting the drill press base to the two layers of ply mobile base, and got all the shelves and rear door bolted up.
Top hatch in place to allow Jim to get stuff out of the back when the drill press is up against the wall.
All done except for final paint, which will come some day when it warms up over 60° for any length of time.
And most importantly, making space for my wife to get back the garage:
Thanks for sticking with me!