Several years ago I played a lot with my Yashica 44. Efke film got too expensive. I did re-roll some APX100 120 after cutting it down on my lathe with a sharp knife. That worked OK but re-rolling it is a lot of bother. I also have some Portra 160 and some Konica 160 color in long rolls. That works, I have a local place that will process it for me... but really, for all the trouble, I have enough 120 cameras lying around to keep me busy for a long time.
Not that I am getting rid of the Yashica. What a nice camera.
tim in san jose