Stone, you really went to great lengths to make this happen! Congratulation again!
Guys, I just processed my last batch of 70mm film. This time everything was done in dark and I can report 0% film wasting on light leaks.
Now I feel sorry for wasted 12" of film leader. Well, it's life....
Next thing is to make nice sticker with reminder when to make one frame break for hanging wet film and for the end of 100" length.
Just load the back in the dark bag, then you won't wast anything but an inch of film