Well even more interesting ideas. I will call Northwood just to get their opinion. I have considered using 3M VHB tape with those plastic no drill mounts and eternabond on top of the edges to hold it down.
I like the idea of a elevated rack for a bunch of solar panels. I am focused on getting the rest of the system up and using my dual extra heavy duty alternators to start with. Solar will be the last thing I do.