Got sick of Setting up my annex on my camper trailer. Came up with this to put on the end of poles. Join poles together and have them on a hinge.

Have included different types as I'm not sure which way I'm planning on going but they are all available.

Printed in PETG, 60% infill and 8 walls.
Can do more/less guessing want this as strong as possible.

The push in pieces, I lowered them down and printed them in 2 halves and glued them together. Didn't need supports this way.