Update #3: processed the roll of color negative film that I ran through the Comet and realized that I was winding the film too much beep tween frames and it didn't help that the gaps between frames were getting larger as the take up spool got larger in diameter. Still, got a few decent shots but can't really tel if they're good or bad since I didn't get any pei to from then.
The lens from the Franka Rolfix, a Schneider Kreuznach Radionar 105mm f!4.5, was mounted to the recessed lens board on my Toyo View 45E and the image looked good. I tried it on a pair of extension tubes on my D610 and it appeared to be working okay. I tested the shutter today by setting the aperture and shutter speeds to the same as metered on my D610. I then cocked the shutter and held it pressed against the extension tubes. The D610 was set to manual and ISO to 400. I then selected Bulb and in quick sequence, held down the shutter on the D610, tripped the shutter on the Radionar, then released the shutter on the D610. I repeated this with reciprocal settings, checking the picture after each shot and found that 1/10 and 1/5 second were too fast but the remaining shutter speeds seemed spot on. Oh, the longer shutter speeds seem to be longer than rated so I'll need to watch for that as well. Mounted this to my 4X5 view camera I was pleasantly surprised to find that the image circle appears to cover the much larger image size! I'll need to run some sheets through the camera using this lens before saying that this lens can cover a 4X5 piece of film.