Re-opening this one because it looks like I'm about to have the same problem as Davis did. I'm doing all the measuring in preparation for drilling that long AN3 bolt hole through the HS-714 angle, F-798 shim, Aft Deck, Longeron, and F-710B angle. HS is aligned and clamped down. Did a quick peek below deck and got that sinking feeling:
We're looking up at the intersection between the F-710B angle and the longeron. It looks like I made that angle about 1/8" too short. So, instead of centering the bolt hole inside the 5/8" of horizontal on the leg of the longeron (BLUE), I need to center it inside of the remaining 1/2" in order to maximize edge distance for both pieces of metal.
Even if my drilling technique was perfect and I managed to put it through right in the middle of that 1/2", I will have only 5/32" of metal between the hole and the outboard edge of F-710B, and 5/32" of metal between the hole and the inboard edge of the longeron. Not sufficient.
Reading this old thread, it looks like Van's consistent opinion has been that the loads in this area are vertical and I might be able to live with this. The alternative would be drilling that F-710B angle out and re-making it 1/8" longer, which will be... not very pleasant now that the aft deck is attached. I'm probably gonna just let 'er rip. If I bust edge distance on the longeron, I'm in a world of pain. If I bust edge distance too far on the F-710B I'm looking at probably a day re-working that piece, so I'll err a little bit towards the longeron center. If there's anything else I haven't thought of, I'd love to know now
Also: glad I looked. The shop head on that rivet though the longeron is awful. I'll have to remember to drill that one out and re-do it too.