I'm about to purchase a whipping siphon/cream whipper. Is it OK to put CO2 cartridges into a iSi cream whipper? I'm reading some stuff online that says to ONLY use Nitrous/Cream chargers in cream dispensers, and ONLY CO2 cartridges in soda siphons. Modernist Cuisine at Home says it is OK to use CO2 cartridges (in addition to nitrous) in a whipping siphon. Can someone please clarify? Even the iSi manuals say "only use iSi cream chargers". Thank you!