This is a relatively inexpensive but high end looking and very sturdy solution
I used silicone adhesives to seal and lock everything together, you can use screws, remember to always drill holes first you don't want to snap the plastic and plexiglass.
I printed but didn't use the bracket parts since I sealed the plexiglass to the aluminum tubing with silicone.
Besides individual part STLs, I've setup 7 STLs to print all the parts needed to produce whats shown
I needed a large glove box and I couldn't find one the right size and expandable if needed.
Also it needs to provided 360 viewing for cameras
So I went to the local hardware store and found;
( 2 ) 96" long 1" square Aluminum Tubing
( 6 ) 24" squares of 1/4" thick Plexiglass
I already had thick & long solvent gloves