Doesn't this method result in the backing paper only being the same width as the film whereas I assume that normal 127 backing paper overlaps 127 film as 120 backing paper does for 120 film so light getting into the edge of the film becomes a problem. The demonstrator does mention this but short of loading and unloading the 127 film into and from the camera in total darkness it risks light damage into the edge of the film
Is there a way round this? I agree that 127 film seems to command a premium price on e-bay, in the U.K at least, simply because it is a niche product with a limited range of films available. So a great idea if film edge light damage can be overcome and re-spooling is relatively simple which I am not sure it is.