Thanks Jim - odd that I didn't find that when I flipped through that forum. It's pretty pricey though (not considering the price of a new one or the fact that I know & trust Andrew to sell a good part) - anyone know of one for less?
I'll take less for mine if the price is too high. I'm in New Orleans right now (saw a Berlina, bizarrely, first thing this morning), but will be back Sunday night. Let's talk then if no one has bitten at the $175 price by then.
Chris, I also have two more used ones coming, which I will test when I get home. If any is usable, I'll let you know.
Alas, I just had four others, but sold them as cores to Wes. Best one extended to 27mm, not great but usable.