Image 1 is the 705 bulkhead. I’m pointing to a dimpled hole, not counter sunk, that go through both the 705D and 705E. I was going to counter sink these but I did a test and dimpling both materials at once worked out OK.
Image 2 is the outboard 715 seat rib. I’m pointing at a 1/8” hole that I’ve dimpled. The plans calls it out for a universal rivet but many are making it flush to not interfere with wing installation. This hole in the side skin is dimpled as well.
