I couldn't get a definitive answer- from a couple of National dealers. So I decided to take a look more closely to see if I could figure it out myself- - after all, I am a licensed A&P mechanic- I SHOULD be able to figure it out.
On inspection, with my eyes wide open, reading glasses on, I discovered that the question for me is moot!
I don't have a FIXED PITCH awning! I have the adjustable pitch model! Maybe sometime down the road I'll figure it out- - if it begins to bother me. But for now, I think I have embarrassed myself enough to last at least a week . Thanks, Ed