I'm mostly writing this...
I'm mostly writing this in response to the other reviews that say
cartridges/converters don't fit. I own a Hadrian, gunmetal, and never had this
problem. Short international cartridges fit fine, and so does an international
converter--though if you're having trouble, a shorter converter may be available
on Amazon (i think one came with a crappy Lanxivi Fuliwen or Skilcraft I bought
on there). Try hooking up with Regal directly at regaltw.com, they might be able
to help as well.