I like reading your post and your wealth of experience. I never tried the Kodak aprons and didn't know you couldn't invert or the problems you would have if you did.
I have a reel that has a clip that you snap open, stick the film into it, then snap it shut. I don't remember if its on a 120 or 35.
Other than a JOBO, how do you rotate a SS in a SS tank? I know you can twist and invert and such, and I never had any film walk out. When i think of twist or twirling, I think of the plastic tank with a stick or rod coming up the middle of the tanks, like the old Ansco or Yankee tanks.
I wonder what happens with the JOBO SS reels in use on one of their processors?