So although they are suppose to be proprietary, I was wondering if anyone knew of a list or had tried other cartridges on their own to see if they fit? (leak free of course...)
Specifically Herbin Noire, pelikan 4001, or montblanc catridges are my main interest. Although, I'd obviously like to hear all as I'll most likely give them a shot.
Edited by Dr. Massey, 21 October 2012 - 13:55.