I'm from Denmark and we don't use sharpies here, but people would probably not ask questions about the pen anyway. But I would like to know if it's practically possible to transfer the gimmick (whatever it is) to any pen of your choice? I don't think it would that much of a problem either way, it would just be great to know if I should run out of ink someday. Which I will eventually if this is as good as they say.
Hey, I got Psypher a month ago, and really love it. Real clean, and great effect. Your question about trasfering to a different pen.... There are instructions on how to switch from the Expo marker that came with, to any sharpie. That will last you quite a while. You can not change it to any other pen/marker though. It is your choice between expo or sharpie. You can however buy other gimmicked markers from Penguin http://www.penguinmagic.com/psypher.php
or Paper Crane.