You’ll forgive me for not making a Sketchup of this part. Scraps from the hoard plus casters from an HF furniture dolly. Gives the project a theoretical 1000# capacity – for when I start machining tungsten and depleted uranium, I guess. The HF dolly was only $8 with coupon and I have no clue where I might get a serviceable caster for $2/ea.
I would like to point out, in defense of my woodworking practices, that I did break most of the edges. It’s the right thing to do.
-- Cheers -- g