Or....you could dispense with a poop board and let all that valuable poo fall into a deep litter bin where it can turn into delightfully rich compost and lessen your work load by about 99%.

Not to mention keep smells and flies to a minimum.
I use natural limbs for roosts and also have a spare roost in there of 2x4 on the flat. I've tried both and most birds seem to prefer a fat limb to the 2x4 but they will roost on both if there's no room to quibble about it. My roosts are 2-3.5 in. wide on average...there's always a skinnier end for the birds that prefer it and a fat end for those that prefer more space.
The important thing with roosts is room....room to mount up, room to sleep comfortably without an older hen pecking yer head off(that means different levels and some good distance between roost bars), room enough their tails or beaks are not against a wall, room to coax young ones up to sleep with mama, etc.