Thanks, everyone.
Vance, your thoughts about my dogged stubbornness in sticking with this tree makes me think of Dan Robinson's influence on me. He always says, "Show me a great trunk, and I'll show you a great bonsai." He has also said something to this effect: "Foliage is just today's news, and branches are mere recent events - but a great trunk is history."
He also, of course, showed the wisdom of studying how trees grow, which led me to think the chances of this tree surviving were pretty good, and he instilled in me a deep love for the visual power of deadwood.
I would never have seen the potential in this tree without his influence, for which I am always grateful. And I am doubly grateful that the fruits of his influence have been so greatly appreciated by you all here. Thank you.
Will/G52