I haven't been able to keep up with my C.R.'s or this Avocet discussion, but I measured my Avocet cranks today and can relate the following.
Large outer ring is 144 BCD Middle ring is 102 BCD Small ring is 74 BCD
I need a couple of middle 102 bcd rings. Is there a source for these oddball size rings? Why in the world would they even make these arms with a 102 bcd?