The final part of the transverse bulkhead installation was the layup just forward of the center spar. Fortunately, this one is done with BID instead of triax.

Looking in from the right side. On the left is the center spar and you can see where it exits the left side around the top-center of the picture.

The BID layup starts at the bottom of the spar, goes forward, then up the main gear bulkhead, up the “slant bulkhead” (then out of the picture). 

Looking up at the bottom of the “slant bulkhead” and then you can (barely) see where it turns aft and stops at the top of the center spar. I had to use some clothes pins to hold the layup in place. Gravity, you know.