So I used a red Sharpie and marked the inside of the AFM where the interference was occurring. This is my target for bashing.
Here's my target to push the case back out a little bit:
And here's my drift tool. I rounded the end to try to minimize digging in and gouging the aluminum:
In position and ready for an adjustment whack:
And the clearance after a couple percussive maintenance adjustments It'still pushed in a little, but it clears the AFM vane:
So now the AFM moves smooth for the entire sweep. Next, I'm going to work on how to put the side cover back into place. The plan is to drill and tap at least one of the rivet locations along the top side. The bottom already has two screws, so I figure if I add a third along the top and silicone it into place, it should be good enough. Certainly better than the broken paperweight I started with.