Yes, I agree that that rivet is popped in a slight angle. Probably to fixate that bracket inside
Here the overlay:
View attachment 1429230
View attachment 1429231
Like I said, I still believe strongly in the L-bracket reinforcement. The fact that they are placed exactly on both side of one grip means that the grip was planned there when they put the rivets. Also, they could have just removed that single grip and glued it back in place after the rivet were popped.
Why would you ever close a tiny hole with a huge rivet? I truly can't understand the logic of that. Rivets are meant to hold something. Something in that area can only mean reinforcement of the D-ring, afraid that it might ruin the prop while running around in Tunisia. It makes perfect sense to me.
Roy