FWIW, I've received my Canonet (two of them, actually -- one for me and one for my sister). Comparing their meters to what my other cameras' meters get, I found that I got the best agreement when setting the meter to 2/3 - 1 stop lower speed (ASA 100 or 125 with 200 film, for instance). This was with a 1.5v silver oxide battery. It seems simplest to just under-rate the film. Losing the ability to meter properly for Efke KB25 isn't that big of a deal to me, and gaining the ability to meter for ISO 1600 films could be useful.