Thanks for this!! I was just trying to figure out how I want to do a poop board and this will work perfectly.If you decide to add a poop tray, a lot of posters use rubberized dog crate pans, which can be pulled out, dumped, scraped, and hosed off if need be.
Something like this (they have LOTS of sizes: https://www.amazon.com/Replacement-Pan-Long-MidWest-Crate/dp/B0002NNWDW?ref_=ast_sto_dp&th=1&psc=1