FINALLY! I can now list something as completed: The head! Actually both the head and the closet are finished, but the head was a far bigger challenge, and exponentially more difficult to accomplish because it entailed cabinetry, extensive plumbing, and electrical work in very tight confines. I was able to fit everything into the existing space.
The space was impossibly small, which created many problems during installation. For example, PVC hose does NOT like to bend. In spite of the difficulties, I don't think I could have done a better installation. Everything is compact, accessible, functional, and (forgive the brag) looking good!
The following photos show the details:
