last week I CLA´d my 4,5/55 - relubed it, put it back into order. Guess what I found?
- it wobbled because two out of three screws holding the focussing helix in place were missing.
- the thing has a nice feature - the rear elements are designed as "floating elements"! Would you have expected that in an ukrainian lens?
After securing the helix and relubing it, the whole thing started to feel much better. :-)
Kaeptn, I could live with two lenses - the PCS Arsat and the Sonnar Tom mentioned. Both are gems.