I had a look and sadly I am more confused than before. Is it posible to build everything and put in some kind of "temporary" enclosure around to keep the panels together? This way I could get the enclosure separately later on (when I get a better understanding, where to get one and for how much). If you have any ideas, I'm all ears.
Anyway, pending clarification on the enclosure problem, I am definitely interested in having the SEQ built as per your calculations. Will you do it?