As noted in several post, the outboard main rib at station 108.375 canít be attached the way indicated in the instructions. The easiest way is to use counter sunk rivets on the doubler as suggested by David Paule. Looking at the ED involved, itís ok ,close but ok.
The question is whatís is the best rivet pattern to use. I have looked at two alternatives. The one on the left is the normal pattern to be used on the other main ribs. The other one is designed to get the most spacing between rivets. I think l prefer the alternating pattern