Because I had already installed my shoulder harness nut plates, I modified this step slightly. Instead of simply glassing the shoulder support and installing it, I used the tip of an awl to separate the BID fibers where they would have sat on top of the nut plates. I moved the fibers around in each of the four spots to make a round hole large enough for the nut plate shaft to fit through. This way, I didn't need to cut the BID - the fibers simply go around the nut plates. I really doubt this area needs that much strength, but it was easy to do, and now I have a clean layer of BID across my nut plates, holding them in place.

The rest of the layup went to plans. I still think this step could use some tweaking, but I can't see
any reason to spend more time here.