John Wiegerink
Subscriber
Yes, I have all of those and two extension backs also. I have shot Efke 25 in mine and it works great. With the ground glass back adapter you can also use off-brand roll holders for 120 film. I use the slide-in Rada and a very nice Plaubel Makina. I know when Kodak Medalist hit the market my father could never have afforded one and he wasn't a poor man at the time. He settled for the Kodak Target Six-16 for his family shooting. I still have that camera.Yes, the Medalists also had interchangeable backs for 2.25”x3.25” and 6x9 sheet film in individual film holders and film packs. These have a ground glass back that can be swung out of the way or removed entirely.
Interestingly the camera also has a mechanism to recalibrate the rangefinder when the accessory back is attached, even though the film plane shifts back several millimeters.