Thanks. I'll check out those website. I purchased a Hi Deluxe from Solartrope (Harting Industry) - but I think the concepts should be the same.

I'm not sure I follow on the vacuum breaker - once I get the panels, hopefully I'll get the big picture and understand.

My better half had the same opinion about the 30 foot roof, so I found a general contractor who will go up and tack them down. Although - I have to do all of the layout / design work - and provide the guidance on what to do. So I appreciate the feedback.

Any other comments appreciated.

Thanks again!