As luck would have it, my kit arrived with a bulkhead damaged in transit.
The damage presumably occurred in transit, because the box was damaged on one side and the material gouged from the bulkhead was also in the box.
I possibly could have used the damaged bulkhead, because I’ll remove the damaged portion anyway, but CLC is providing a new part. The upside for me is a second bulkhead for experimentation. I have practically no woodworking experience and no experience with a circular saw or saber saw. If the damaged bulkhead seems too flimsy after cutting the hole from it, I’ll reconsider the whole idea (no pun intended).