Long ago, a buddy of mine had a Fuji single 8 camera and we used to cram about 30 feet of Eastman film into his used single 8 cassettes. 30 feet was about all you could fit because the Eastman film was thicker.
Now, it occurs to me that since single 8 is still being made and is only about one third the thickness of Eastman film, then some industrious person could perhaps load Fuji single 8 film into a (new, jitter free) standard super 8 cart. The question is: Just how much extra film could be loaded? I mean, if the film is only a third the thickness, wouldn't that mean you could have a third more film? Or would that mean two thirds more film?
Just imagine, a standard super 8 cart with about 83 feet of film. That would be about about a continuous 4 minute run (I think). Anyway, while some have tried having Fuji film perfed and loaded, the perfs seemed ragged but Fuji apparently does not have that problem and I would imagine it would run smoothly. The only questions are A) will the thinner film run correctly and B) the footage counters will go bonkers.
Hmmmmm. Anyone got a phone number for Fuji?

Roger