Hi all, I'm working on a design for a new desk out of 3/4" EMT conduit, and looking for some help.

I want it to be light-weight, easy to transport, and easy disassemble / reassemble.

It's meant for standing, and I'm considering how to adapt the design so I can sit in a cross legged position while using it.

The design has two identical shelves: a lower shelf for a keyboard and mouse, and an upper shelf for my laptop.

The shelves are supported by side rails underneath, and the legs go through holes in the corners to prevent lateral movement.

The legs extend a little beyond the shelves so that I can add quick release clamps to prevent upward movement of the shelves.

The problem is I haven't found suitable quick release clamp-style shaft collars to prevent upward movement of the shelves yet.

I found these shaft collars for EMT conduit:
https://shootingtargets7.com/products/emt-conduit-shaft-collars

But the problem is they use a 10-24 x 1/2" socket head cap screw, and I can't find a quick release lever to go with that.

There's these shaft collars on Amazon:
https://www.amazon.com/Shaft-Collar-Aluminum-Thickness-Screws/dp/B0BNZ9MWLN/ref=mp_s_a_1_15_maf_2?th=1

Which use an M5 bolt, and I can find M5 quick release levers:
https://www.amazon.com/CAMVATE-Release-Locking-Silver-Stainless/dp/B0CLC8VHDT/ref=mp_s_a_1_19?th=1

But they have a bore diameter of 22mm or 25mm which I think won't work for the 23.4mm outer diameter of 3/4" EMT conduit.

Can anyone help or have alternative ideas?

I wanted to avoid drilling or using any fasteners on the wood for ease of assembly and transport.