There are some occasions where I find it impractical to use a fountain pen, like when I'm underlining in a book with really poor quality paper, but I don't necessarily want to use a pencil either. In those instances, I really like the Pilot G2 .38 gel pens, but the body of those pens leave something to be desired after I've grown accustomed to writing with nicer fountain pens. So, I've started looking around for other pens that would accommodate the Pilot refills. In my search, I stumbled across this site: http://pensofdistinktion.com/cart/index.php?main_page=index&cPath=5_7. The prices seem really high and I've had fun repairing fountain pens. So, I thought, why not try to do it myself? Has anyone ever tried converting a fountain pen to accommodate a rollerball refill? If so, what's involved? I'd assume that one might just purchase some sort of kit with the hardware and try to fit it to the pen. Anyways, anyone ever tried it? Tips, hints, tricks for doing so?