We did get our panel directly from Sunflex. They were pretty quick getting it here and it was packaged really well.
I agree that the Sunflex picture looks relatively square. In reality the product matches the specs shown under the description of the 40 watt unit. It's closer to 2 to 1 than 1 to 1, actually 1.7 to 1.
I believe a single panel would fit on the rock shield. We plan to have two of the 40 watters and they would not fit on the rock shield.
We are generally opposed to doing temporary mounts. We don't carry coolers, chairs or anything like that inside the trailer. Our goal is for everything to have a place and not have to be moved to set up or live.
We like our setup to be as quick and simple as possible. Next year we'll be on the road for 300 days, meaning that we'd probably have to setup 70-100 times. For this reason we'll probably permanently mount our panels. As well we don't carry a ladder to make temporary roof installation a possibility on the roof. We depend on occasionally borrowing a ladder as we travel.
We do like the thinness and lightness of the panel. We don't think it will interfer with the slippery-ness of the Scamp
. I will say that though they are called flexible panels, they are not nearly as flexible as the UniSolar panels. You almost have to think of them as sheets of 0.050 thick aluminum panels or greater. They bend but are not floppy in any sense.
I am seriously considering the marine fitting idea, plan to check them out when (if) the rain stops. (I had hoped to give the panel a test today but it's been a downpour all day.)
I have never considered rear mounting the rock guard but I do use plastic pipes with bungees down the center for rock guard support. I've occasionally considered window awnings because they look easy to do but neither of us consider them a necessity. We haven't had them in all our RV years, we simply close the curtains when necessary.
Thanks for the thoughts, it lookslike the marine fitting is a go.