Still using the stock black ink inside my Pilot Plumix and sometimes it writes very light and looks almost grey. At first this annoyed the hell out of me, but now it is growing on me. Apologize if this has been asked before (couldn't find any threads in B&B search or a targeted search on Google), but does anybody here have experience with grey ink and if so what are some good ones to go after? I'm feeling its time for a healthy Goulet sample order!