Modernist Cuisine at Home has many detailed recipes involving a pressure cooker but never says what size is needed. It is not easy to tell, because of ingredients like chopped bones that are not of a certain volume. Has anyone figured out what size is needed for these recipes? There are photographs on pp. 29-33, p. 113 and other pages that are all Kuhn-Rikon: some may be 5 liter and some 7, since they always seem to have the long handle and those are the two sizes.