Hello Blue Sky
I am impressed that you developed your own design for a rear awning. We also have a stock FWC rear awning for our Grandby....when it useful, its really useful.
Two things I see in your design that might warrant further consideration:
-The support bars ride on the jack brackets...making them mighty low for banging into when coming and going......easy learning curve I guess....
-The top awning rail is attached on top of the roof instead of the rear vertical face....somehow seems a weaker attachment being on/in the roof.....awnings take a lot of energy when the wind blows.
Again, its great to see someone who is improving the camper to their needs.
David Graves