How did you attach your solar panels to the roof? I plan to bolt through or next to the cross beams. I would like to keep the panel frames about one half inch above the roof while keeping the attachments out of the valleys for cleaning purpose. Frames like they use on houses are too tall and those brackets they sell at Renogy and Amozon are too flimsy. I’m thinking that 70mph travel with maybe 20 mph head wind gusts is not uncommon and I have seen pictures of those thin aluminum brackets ripped apart. Am I over thinking this with bolts through the beams instead of sheet metal screws in thin aluminum brackets? Have you done something similar to what I am thinking about?