Besides awaiting for the cold weather to pass, my father and I are stumped at the butt rib installation part of our build. We have placed our butt ribs on the aircraft but we seem to have a longer "tail" to the butt rib that covers the rear bolt head in the wing spar. Hopefully, the pictures I attached are shown, since that will better explain the situation. We triple check our measurements from Rib #3 to Rib #1, and still find ourselves cover the rear spar bolt.
While the easiest fix is just chop that "tail" off, I am extremely reluctant to do so till someone who is more experience then us in the build says ok.