This is the first Workmate hack I built:
I started with the scrap Workmate my neighbor offered me, a junk aluminum level for the side risers, a freepile IKEA butcher-block cart, a beautiful 1” thick hard masonite-and-formica top and some casters scabbed from an ANTHRO cart that was being discarded at work.
The final product is sturdy and portable. I use it all the time in the garage.
(You can see the 5” leaf leaning against the leg in the shot below.)