Using my pneumatic alligator squeezer, setting all of the rivets in the F-728B angle was a breeze. Accessibility of the lower most 3-4 rivets was a bit tough as expected but I managed to set all of the rivets with no issues.
I then fit the bellcrank assembly. Perfect! I did notice thought that the bolt slips in place much better going from the right side to the left, rather than the left going right. I still have to set that top missing rivet...I'll wait until I get the baggage floors and top skin fitted to make sure alignment is good.