Thanks Dave and Bruce - sounds like it's just the nature of the beast, and I think I also read something about the focusing wheel being mostly for the 50. Still in the early learning stage on these Kievs, but I'm really getting into them.

BTW - still getting up the courage to clean the 4a, but I did manage to wrangle some samples of that Poron foam that Russ uses, 2 81/2x11 sheets, so if anyone wants some of it let me know.....

Cheers, Bob