Since you're going with poop boards:
https://www.backyardchickens.com/threads/feedback-for-8x8-coop-inside-layout.1224022/
You might consider shavings on the floor, 1 or 2 bales a year would do the trick.
8x8 is a lot of PDZ and I'm not sure what the advantage would be.
That's pretty cool.
I prefer the 2 screws into edge of 1x3, gets into corners and can adjust the depth by tilting-which is nice for mixing in additional fresh PDZ.
Different strokes(literally) for different folks.
How are you liking the PDZ on the coop floor?
Depends on how you 'scoop/sift'. ;)
I like it thinner (<1/2") and sift it all on boards(~30sqft) instead of just scooping.
Then they don't dust bathe in it(wasteful)....and keeps things cleaner overall long term.