90 Cron AA doesn't go to infinity
A few weeks ago I sent my whole kit to Leica CS in Solms in order to get some things fixed. I bought almost everything used, so the M7 got the optical DX reader, the 50 Lux ASPH focus ring runs smoothly now and the 90 Cron AA no longer back-focusses. Everything was adjusted and calibrated. I'm very happy with the result except one thing which seems odd: the 90 Cron no longer reaches infinity, i.e. the rangefinder patch moves into the correct direction for distant objects but the two images don't fully match. A tiny bit of range seems to be missing. I don't remember that this happened before the lens went to Leica. Is this something which I should worry about?