When I wrote my first post in this thread I also put a self-CLA'd Zeiss Ikonta in the fridge (-18C/0F). I took it out of the fridge just right now. This was CLA'd without the superb Moebius oil and worked ok at 1/25s. Faster speeds were no problem, slower a bit erratic though [The main worry now is the amount of frost that immediately stuck on the lens and elsewhere, haha.... ]. Well it was a test.