Can anybody help me out with building the nest box? My BIL that was helping build the coop is now gone so I have to finish it myself. Luckily all I have left is the nest box and just have to attach the hardware cloth for the vent along the roof line. I have in my head what it will look like, etc I'm just not sure how to actually start it. Do I need to build a frame and attach the plywood to that? And how do I attach it to the coop? Any help will be greatly appreciated. I have the opening as 38 inches. I believe I was planning 3 12-13 inch boxes, minus wood space, etc.