Nick, I did go back and look, and I really think it is threaded.
The deal with the free Leica stuff is a story I'll tell sometime. I'll probably auction the stuff for charity after he passes, as it was clear he really wanted me to have the stuff, and I didn't have the heart to tell him that I really don't need it. I'm talking about a sedan trunkload of stuff. It was a weird little philisophical dilemma. Later, he dropped some stuff off with my wife, a bunch of worthless darkroom stuff but he told my wife it was his fathers and he was a little weepy about it. It's not like he has a terminal disease; he's just going digital (!?!) I drop him a print a few times a year and tell him how great his stuff works (as I'm sure it does) and he is happy as hell about it.