I love the flow of some fountain pens, but sometimes all I want is a rollerball. Does anything out there exist? Examples; I love the OHTO Fude Ball Rollerball Pen in 1.5 and the Uniball Air pens too (not the exact same thick line but still very smooth and "flowy"). I would also love to find something with maybe a metal body and refillable. I have the metallic versions of the G2 with a 1.0mm refill, but sometimes it just doesn't cut it and I need something thicker. Lately I've been using the Pilot Bravo Marker pens and Paper Mate Flair Bold version, and I get crazy looks in the office because I'm writing in marker, but that's the only thing I've found that has satisfied my itch. So, I am looking for guidance on a (hopefully) refillable, (maybe) metal rollerball with a nice, thick refill. Thanks!