Tom Fine:

> the tape would be pulled out the middle of the shell and put in a little isolated-loop drive

Transports to play Philips Compact Cassette tapes (loaded in-shell)
with a loop pulled outside the shell have been built.

> Better still would be a way to adjust the two pinchrollers so you could
> vary the tension/wrap on the heads.

Tension and wrap are never (intentionally) controlled by pinch
rollers. Where did you get that idea?

> Probably not worth rigging up such a beast for lowly cassettes.

Perhaps not in your world. But we have seen instances where missing
segments of original master tapes have been found only on the session
safety cassettes.

Fred Thal
ATAE Studer / Audio Transfer Laboratory