I remember in the late fifties/e sixties that you could buy film refills from Kodak and Ilford, and others around at the time, for around half the price of a ready to load film,all you needed was some cassettes of the time, before the crimped ends of today, you pressed the sides of the cassette, the top popped off, then in the darkroom, you attached the end of the film to a slit in the center of the spool,put it all back together and away you went, a boon for cash strapped school kids,no DX coding, no problems, \oh for the good old days