Not so much workbench as workmate. Have been building a few things first has been legs for my Gauge 3 line, the ply came out of a skip and has been cut to 2 inch strips by a pub buddy. The 4 legs created will sit in L format with strips to join them for the layout to sit on. I did this system for my 0 gauge exhibition layout years back and it worked very well, though then it was all 1.5” timber with just legs and angles to keep the legs upright. Both systems quite lightweight but remarkably strong and easy to transport. Plus 2 of my new ones have cross pieces at height for Chopsaw amd Workmate to help with long lengths of wood.
Temp lash-up to show how straights will be made up, layout 16ft long and to pieces will be held in place with bolts and wing-nuts overlapping at joint of top pieces.
Here I am chopping a long length of wood on Workmate with L supporting extra length to make this:-
Still a work in progress but the length being cut will be a hinged joining piece for my take on one of these:-