My coop definitely followed the 90/10 rule. The last 10% has taken 90% of the time to build. It is a chicken tractor. It was designed about 3 months ago, but build over many scattered evenings and weekends. I used a lot of input from members, but it definitely has some unique features that I haven't seen with others. Hopefully the coop will work well for me. The chicks are just 4 weeks old and are just in it during the warm weather days. https://www.backyardchickens.com/web/viewblog.php?id=6900 Let me know if you see any problems, or if I need to clarify anything.