As I experiment more with lens signatires, especially the helios 44 M-6 lens on 35mm, the old vivitar body I am using has some issues with foam needing replacement, and sometimes the film transport is a bit unreliable. For the cost of a CLA, I think buying another manul bodymight be the way to go. I never thought I would be where I am right now, thinking about re-investing in 35mm, but the $20 Helios lens has gotten me intrigued, and it would be nice to get a reliable body for it. I sold all of my contax gear some years back and it helped fund a bunch of stuff large and medium format wise. Now I have a hankering again for a Contax RX to use the M-42 lens on. I used M139G, RTS, RTS-II, RX, and Aria bodies in the past and know the contax system well and am spoilt now.... Like I said, I never thought I'd be re-investing in 35mm again.... So I'm looking at contax bodies, but wanted to know what brand of M42 mount to get for it. I realize I will lose features going this route.... That's okay, but I want to know more about whether the lens will still have inifinity focus with an M-42 adaptor? I do not believe it will be a problem, but need the gurus here to let me know... OR tell me I am smoking crack and need my head looked at!