Better season extension?

I have a feeling this will be a much better system than my first effort. If you can't tell this setup is much more compact and will be mobile when I figure out how I want to finally attach the plastic in a semi-permanent fashion. The down side to this was that the units were fairly complicated in the number of pieces that had to be cut. The upside is that all my crops are still alive. Hopefully this gives someone an idea of what you can do to keep growing crops even after the traditional season has ended.