First off, this is a fantastic site. A ton of information on here as well as a thriving community. I'm building my first system right now, a small 45G FT. I'm trying to learn from this one and maybe a few more progressively bigger ones before I implement a larger greenhouse build in the next year or two. Hopefully I can make this a big part of the bio intensive outdoor garden I'm working on. For any of you in the NC piedmont, I'd love any input on yearlong greenhouse design.