Wonderful! Does your copy of the M-44 have an A/M switch? That's the only thing I wish I had on this lens- it's my only m42 lens, if that were the case it would be almost heaven..
I did muck up my M-44, though- when I was re-assembling the lens after lubing the focus mechanism, I lost the teeny-tiny ball bearing that stops the aperture ring at the various f/stops.. anyways, I put a piece of kraft felt inside to give a bit of friction- I now have a constantly variable aperture lens! Just makes it tricky when switching between open/stopped down for focusing.
the tessar you have- what focal length? I know those are fantastic lenses also.
Oh- and to be on topic with this thread- your project to adapt the broadcast lens to an SLR is just awesome! Wondering how hard it will be to find bellows- I remember 3-4 years ago they were all over the place. Do you live in an area where craigslist is a possibility? If you do find one and can get the exact measurement of the offset you need, it would be interesting to approach a machine shop to make an all-metal adapter for the lens, that way you could have some sort of portability!