Hi all. My husband purchased a starter coop for me from Urban Coop Company, and I'm getting my first 3 chicks delivered in March. I'm already wanting to upgrade to a larger coop to make more space for them. I was initially going to buy the run extension for it, but now I'm thinking I will just built one myself. The run extension the company offers adds another 8 sq feet, but I wanted to maybe double that and increase the height. Has anyone successfully built an extension for a previously purchased coop? If so, any suggestions or photos of how it turned out? Thanks!