The one year old ask was for an option to save all the frames in FITS format, not just those successfully stacked. Does your suggestion achieve that? Are you saying that turning off Live mode (never tried that) and with Save each frame turned on the S50 will save every single frame, 6 frames per minute, with 100% efficiency? No dropped frames, star trails, not enough stars, 50% stacking efficiency and all that nonsense? Why did it take over one year for you to tell us that?
Will this work in planning mode? There is a warning that setting Live mode off will affect Framing mode but since I do not use that I do not care.