It such a short piece of film, M. Lointain, that I believe you could just develop it in open trays in total darkness like you would sheet film.

The nice thing about using the Minox daylight developing tank is that it requires only 53ml of developer. I prefer it for b&w film, but I prefer the Jobo 8x11 reel for color film. I don't know if you can still buy the Jobo 8x11 reel. It was based on a modified 35mm reel, produced a few years ago by and Minox, I believe.