How can I hang something heavy from the underside of my desk?
The two main ways I came up with was to create a simple 4-sided rectangle shelf and screw it to the underside of the desk and slide the heavy stuff into it, one on each side like saddle bags on a bike or motorcycle. Alternately they could slide into place using some kind of track of french cleat though I have not found anything suitable to do that.
The quick and easy was was to use "plumbers tape" which is basically thin steel strips with holes in it, to quickly create a U bracket to attach the items to the bottom of the desk.
Here is a mockup of my desk showing the shelf idea. Ideally I would like these to be removable so that I can disassemble and reassemble the desk easily in the future. So if anyone has an idea or knows of a bracket or sliding rail system that would work that would be awesome!