I have been using various FSU lenses on my Leica M3 via an LTM to M adapter.

I have 2 different adapters (1 chinese, 1 voigtlander). When I mount my Jupiter-8 I notice that it does not line up with Infinity at 12 O'Clock on either adapter (both adapters mount the lens at slightly different points). Does this make any difference in usage? It seems like all of my lenses focus at slightly different distances for the same target. Infinity seems to be fine with the Jupiter-8 though.

I also have a Voigtlander 15mm that mounts crooked as well. I bought an LTM to M adapter from voigtlander that is designed for this lens so I am hoping it fixes the problem. Any experiences with this combo? I am concerned right now that the lens shade is misaligned to the body.