Comment: I got a kit...

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In reply to comment: Very cool! (see in situ)

I got a kit...

that came with triple wall polycarbonate panels. They are very durable & more cost effective than glass but do need to be replaced after 10 yrs or so. Sounds like you designed & built from scratch...hardcore! I'm sure that's way more cost-effective. Did you put a water tank inside for thermal mass?