Hooting and hollering at the things this guy is doing with aluminium t-track extrusions and Ikea storage bins https://youtu.be/kzDzTrGZJxs
@rocketpilot standard schmandard 😀 The beauty of it is the simplicity and that you can up- or down-size it however you like, make it from whatever you have lying around
I made some 1cm thick beam versions from scrap to play with, and used 3mm SS bolts from ebay. The holes were a little bit fiddly to drill correctly but not hugely so (ok with a drill press and a fence with cm markings), and I can always widen the holes a bit if necessary.