If only some of the Old timers are willing to confirm to them that the design of the film take up system with the set of Nylon "Needles" on the Pentax MX is probably the world champion for an easy to load yes manual loading film take up system.
I am not surprised if young engineers who did not work on fiilm advance systems need a Nudge as the advance needs to ONLY move the film forward, exactly 8 perforations, while clearing the shutter lock to allow the next picture to be taken (and in most cases also charge the shutter) PLUS have a way to disengage to allow the film to rewind. that is at least 3 functions, two of wich are not directly involved with actually MOVING the film.
the camera mechanism needs a double expsure prevention system as part of the wind, BUT with a handy way to permit INTENTIONAL double exposures