I start building it tomorrow and I'm unsure of a few things. First, yes I need an external nest box. The coop just won't work long term w/o one. I planned (and bought hardware) for one with a hinged lid, but I'm just not sure how to attach the lid in such a way that water won't come in (in Portland Oregon, so rain is our reality much of the year). The coop roof sticks out some on that side (1 1/2' or so) and it is under a tree, so there is some weather protection already in place. I had thought to attach the hinges under the plywood lid and add an upper 2x4 support inside to secure the hinges too, but when playing with this idea w/ scraps it seems like there will be a decent gap between the hinge, and siding and lid, since if the lid is flush to the siding when closed it will hit the siding and be unable to open. Seems like the same kind of problem will happen if I add the hinges to the top of the lid and secure them to the siding. Any ideas/pictures of successful external nest boxes w/ a hinged lid? HELP!