Quick test of a new process: I loaded super diluted Namiki Blue into my Sailor 1911s EF. It works the way comic artists use non-photo blue pencils... I sketch in super light blue, ink in black, and then I can remove the blue digitally.
This could allow me to eliminate pencil altogether. (fountain pens are truly the part of art I enjoy most.) Also, my two favorite writing inks in the corner - Iroshizuku Tsukiyo and Yamabudo. The Pilot is a 742 PO, btw.