I moved from the bottom to the sides. I was able to easily reach all the side skin rivets. I used a light inside fuselage to help see. I paid attention to which size rivet to use. This didn't go perfectly though. I used a couple of short rivets and had to drill them out. And sometimes I used the wrong end of the bucking bar and shanked a rivet and had to drill it out. A couple of rivets got overly smashed with very small shop heads, but I did not drill those out. To hard and will only do more damage. They are solid.
Recall I'm doing the rudder stop per drawing so you'll just see four rivets where the metal stop would have been. Later I'll do an internal plastic rudder stop.