Upload & Sell: Off
Any medium and large format camera that uses a digital sensor that crops the image loses some, or a lot, from it's original attraction. After a few experiments with medium format lenses and medium format cameras cconnected to a DSLR I would recommend to stay with film for this type of camera. I had my share with Cambo Ultimate 35 adapters and Canon 1Ds bodies, Hasselblad and Pentax lenses, but in all cases my conclusion was it is not worth the hassle. Size, cost and handling are big issues and even if you use only the best center part of a lens and the results are very good, it's just not good enough in comparison to it's full frame use on film. At least not what I expected. I just don't like cropping lenses I guess, this is the very same for me with 35mm lenses on crop cameras. To be honest, I can't speak for the RZ system. I have sometimes worked with it in the film era, but not on digital. My experience with Hasselblad and Pentax (67 and 645) though lead me to believe that if you want the rendition of the 110 on 67 film, you'd better stay with film. True, you'll have to deal with the analog part of the workflow, you'll miss high ISO performance of modern DSLRs and a few other features of digital that are nice to have, but medium format film has a look that can't be emulated by digital. Since 67 digital backs from Sinar, Leaf or Phase One with a large sensor (still not full frame 67) cost you a kidney, or two, I think it is very well understandable why still a lot of amateurs keep their medium format gear for film. A pro who knows why he needs medium format digital backs will most probably use them on a modern MF digital camera or rent it every now and then. For the rest of us, 67 and other medium format cameras are (almost) dead.
So if you have an RZ with 110, buy a roll of film, have it scanned or buy a good scanner if you want to use it seriously. If not, don't spend the money on an adapter for a DSLR or mirrorless, it will prove it's not worth the money and the hassle.