Great job! Our coup is very similar to yours and it does get very hot in there, even at night. I ended up adding an inside door, similar to a screen door, but covered in 1/2 x1 inch welded wire, so that the solid door can be left open for more air circulation. The human doors are closed up in the winter and the smell is just awful even w/2 windows cracked open and a 2x4 foot vent fully open; my birds refuse to venture out in the snow though. The more ventation the better. Is your front overhang covered with something? If not I would suggest bug screen covered with a heavier mesh to keep all unwanted guests out of the coup, think bees, squirrels, etc. Keep up the good work and enjoy!