I bought the plans for The Basic Coop from the Garden Coop (also available on My Pet Chicken). However, I'd like to have an external nest box instead of the nest box inside that the plans call for. The Garden Coop website blog has a tutorial (no plans) of how to add an external nest box to The Garden Coop, but obviously the Basic Coop is a bit different. I was wondering if anyone had ever done this and had any advice (or better yet, plans). It calls for a whole 'nother piece of 4x8 plywood and since I'm already buying 2 for the Basic Coop, I'm wondering if there's any way I could get by with the lumber that was supposed to go to the inside box and maybe a bit more (not a full 4x8 sheet).