My coop has two interior nesting boxes. I'm having a lot of trouble opening the egg door (shavings are getting caught between the door and the boxes and i can't close the door back up properly and due to all the rain, i think the wood is expanding and i can't open the door properly either). I was thinking about converting these boxes to exterior nest boxes. As anybody ever done that?? here's a picture of my egg door (its the white door under the window). Can it be done and how hard is it to do??