Hi there - I've been spying your poop board and ledges, and plan to build these for my coop. For those of you that have them, would you be willing to share your measurments and tips? I can see photos all over the site, but I have'nt found any posts with actual measurments. I'm looking specifically for the depth (I want to make sure their butts are actually over the boards), and the placement of the roosting bars over the ledge/board (how far from the edge do you have yours placed?). Also, how high off the ground do you have yours? Thanks so much!