I looked at your run photos and it looks fantastic! Your hens must love it!

I do have some ideas for your coop. Seems you’re pressed for space, especially floor space. You’ve put a lot of work into your sawhorses and tower stands I know..but, It’s going to be a nightmare to clean floors with all that furniture on it.
I would opt for some wall mounted fixtures instead. Mount a 2x4 across the back wall using lag bolts into your vertical corner angle iron. Invest in a lightweight wall hanger galvanized double nest box. Mount it to the 2x4 and attach a 2x4 spacer across the back-bottom of the box.
Now attach a horizontal 2 foot long 2x4 on the end walls with a 3 foot leg under each one.
Now you have a place to mount a 6 foot roost across the length of the coop, and there’s no furniture on the floor to sweep and shovel around! Just so it’s a bit higher than the perch on the box should do.
My hens prefer a smooth sanded 2x4 laid flat to roost on. I’ll post a photo of the nest box. The removable pans make it easy to clean and change the shavings.
I hope you don’t mind, I copied your coop pic and did a crude finger drawing of the braces and roost.