We have it partially built. Here is the gist of things: As you can see, we have 3 walls (now all 4!!) up. The window is a south facing winter window. The door will fast northwest but TOWARDS the INSIDE pf a three-sided run in shelter.... so completely sheltered. The pop door is on the far right bottom corner of the side wall. The side walls are shorter because we will also have windows on the side. So... I was thinking of 2 nest boxes, stacked above each other, in each corner. I need to know the best roost placement, though. I was thinking of putting the roosts in front of, and semi-level with, the window that faces the winter sun. That way, they can warm themselves in the sun when it's cold. Can i put 2 there- one further out and down, and one towards the top of the window, and closer to it? I was going to have the poop board rest on the tops of the nesting boxes, so 2' above the floor. However I can also do the roosts on the sides, parallel to the side walls. The roosts and poop boards WILL be detachable for cleaning. What is the best roost placement, though?