Is it my imagination, or each new unit is larger than its predecessor? The varied designs should give you some indications as to the strengths and weakness of each design, and how to compensate next year. I showed my wife the previous two. We wish we had the right conditions here to do the same.
In a week or two we should no longer be experiencing overnight freezing temps and can move our seedlings into the greenhouse. However, it looks like we are not going to have a great growing season. Crossing fingers and toes.