You are correct about using Nitrogen (or Argon) as opposed to CO2. They will not carbonate your wine. I cannot answer your fit question as I have seen multiple sized cartridges and do not know what CO2 charger you have. I have a picnic CO2 regulator that works with a corny that I purchased from a brew supply store. Mine has a regulator, some don't. I never thought to try what you propose. The only non CO2 cartridge I have is in my Coravin and from what I can tell without taking it off, it does not look like it will fit. I have tried many of the home wine preservation and dispensing systems on the market. Each use N or Ar to dispense. Look up: Winekeeper, Winesaver, PEK Preservo, Coravin, Cuvinet. Each, except the Cuvinet, has a cartridge option. For my beer use, one cartridge was not sufficient to dispense a 3 gallon corny.