Okay - I'll check out those cable options, thanks! Now a mounting question...
We've been looking at pics of various mounting methods and the one my husband seemed to gravitate to involved aluminum angle mounted on the corners going down to angle mounted to the roof. Regardless of exact style, it seems like a lot of people mount using four feet at the corners. Is everyone getting lucky that their panels happen to be a length that lines up with their studs? Or are people not worried about hitting something structural? And is four enough or is it dependent on the size of the panel?