Cartridges have one other problem ... you never know when you are going to run out of ink ... maybe in the middle of an important meeting, or with five minutes left in a crucial university exam (been there, done that). Think of them as "disposable batteries" for your pen. With cartridge converters, you can top up the ink supply to "full" whenever you want, to make sure you have a good supply for the day/meeting/exam/&c just like topping up a rechargeable battery (but much quicker.)
Originally Posted by Go West Young Man
Be there or be square. Only I can do both!
I've got a cat named Beefeater and a dog named Beefeater, and two goldfish called Beefeater and Beefeater. There's Beefeater my hamster and Beefeater my horse, and my piglet, known as Beefeater of course.
Veteran of the Great Irisch Moos Campaign of 2008-09