My work in progress.
Goals: lightweight, simple, front part removes easily and stores on top of the back. Rear area can be permanently installed and the front can be left at home for around town.
The box. I will not build drawers but rather this is sized to accept two under-bed plastic totes.
With 5/8 plywood trimmed to fit
Front area slides directly back and sits here. When installed in the front it will key into the center beam and have screw-in furniture type legs (in progress)
Patented stud mount for front brackets