I thought I'd give a quick update to this, since I think it's finally over.
I ended up hiring a lawyer. One recommended by my T and he was/is pretty good at what he does. At one point, my brother called him to rant on the phone. Lawyer emailed after that and said "Now I know why you hired me!" His dealings with my brother were instructive. Everything was brief, direct, and factual. He concluded nearly all of his letters with "please respond" or "what is your response" etc. (Letters to my brother or his lawyer, that is.) During the phone conversation, he said my brother refused to shut up long enough to let him say anything until he informed him that, if he didn't get a chance to speak, he was hanging up.
I got another chance to go pick up the items I went after in May, after we spent a couple months bickering over the real estate transaction. It was good that I had a lawyer, because the one my brother hired was really representing HIM, not "the estate" and certainly not me. I was supposed to sign a quit claim deed (eventually, their original plan left me in a potentially bad situation), which I did, but I didn't hand that over until after I had the stuff loaded in my truck. For the exchange, I told my brother that I would not deal, one on one with him, he would have to have someone else there. My T helped my write the email and that part was worded, "your wife, a pastor, a deputy, a neighbor, or some random person come to mind..." That was T's line, but I liked it enough to use it. He had his wife there. (His THIRD wife, I might add.) I'd only met her once before, briefly. She seems very nice. He must have really wanted the deed, because he never set foot outside his house. (My T says that was more than likely because he's still trying to make a good impression on his new wife.)
Anyway, things worked out pretty well and, with any luck, I'll never have to deal with him again.:)