And CAD confirms it will (can?

) work.

- hatch telescope 2.jpg (133.55 KiB) Viewed 2401 times

- hatch telescope 1.jpg (45.93 KiB) Viewed 2401 times
I'm using 0.083" walled steel square tubing from McMaster (if you want to use this on your own build, make sure you buy stuff noted as for telescoping use, otherwise you'll get a weld seam on the inside of the tubes and they won't slide correctly), plus a snap button and 1/4" diameter push button quick release pin. The 0.083" tubing should be much thicker than your average Easy-Up leg, so I don't anticipate any problems holding my ~40lb hatch up. You also definitely need the pin, if the snap should fail you could easily break bones with the hatch slamming closed and would definitely cause some damage to your tear. I've used the push button pins at work, they're much more expensive than the spring-loaded ball detent style alone, but they absolutely won't work themselves out and anyone touching instead of looking is less likely to remove it.
As with every McMaster order, I found a ton of other stuff I don't know how I have managed to survive without.

7/8" screws for assembling two 1/2" panels together, footman loops for holding down the oven and dutch oven, 50' of webbing, 25 pack of buckles, etc.