If you want a temporary solution to get you through the season these arms have some flex to them. Camco makes an awning tie-down kit that we always use because here in Colorado you can suddenly go from no wind to 50mph, and tear the awning off before you can react. I've found that the gas struts in these things have some give and if I tie one end down a little firmer than the other it changes the angle enough to get good runoff. It doesn't take much.
I do this for a different reason. We have Solera's "easy pitch" system or whatever they call it, I can't remember. The one where there's no star adjuster knob, you just pull down on one arm. But the awning is so high it's a pain to reach it, and it resets every time you retract the awning. Since I use the tie-down anyway (and that installs by just tossing the strap up and over) I stopped bothering with the adjuster arm. It's not elegant, just throwing it out there as a Plan B.