This setup WORKS LIKE A DREAM. It's approximately half of my Hasselblad setup (the other half being a 500CM with 120 CF and only one A12 back) and I am sticking to my policy of selling something to fund something else. I REALLY don't want to part with this stellar lens - as I swear it's the sharpest I own - but since I'm replacing it with another system of approximate focal length, I shall keep the 120 and part with the 50.
I picked the lens up from my local camera shop when I was having the back and body CLA'd. Right after servicing the body, I was given (literally) the 500CM body and haven't used the 500C since. It's still fresh and clean! The 50 lens stayed pretty much on my system non stop - it is my favorite lens. I will include a shot taken with this lens in my pics of the setup.
The two backs - the 12 back is the "peekaboo" style where you line up the # through the hole. The 24 back was never used by me, but seems to be the newer style "automated" type. I hear you can easily use if for 120 film as well (again, never tried it).
The body has some scuff marks (see pics) but functions flawlessly. I am even including the lens hood that I JUST bought and received like two days ago.
Price is $999 plus shipping in the US.