Very handy workbench/trolley, i can imagine a few of them scattered around the workshop and/or put away in a corner until parts arrive or restored and just pull each game as needed.....

You might consider putting some form of tool-tray along the sides (along the carpet edge) so all your screwdrivers and things are *there* and accessable....
The tool tray could simply be a series of various-sized holes right along one edge of the carpeted layer, assuming it would be a bit wider to accomodate the pinny cabinet AND the tools alongside it.......food for thought...

You could also mount a floodlight on extender arm to the main framework, which then pulls up into place into the cabinet and so forth, and possible mount a kambrook powerboard on the framework to allow soldering iron, heatgun and test gear to easily plug in to.....the extension lead could roll up and hang on a hook on the end of the trolley too and remain permanent on EACH trolley to eliminate mucking around with power cables and tools and other time-wasting crap ;-)

The ideas above are based on some tool/work trolleys i made at my last workplace, and VERY handy to have a few around.

Oh, if you decide to fill in the sides with solid sheeting, you could always decorate it with retro pinny artwork to suit ;-)

Cool stuff Nino!!!