Inks appear to be a volatile topic amongst FPN'ers. I have a Parker 51. What do you think of http://www.jetpens.com/Sailor-STORiA-Pigment-Ink-30-ml-Bottle-Magic-Purple/pd/14150 and dye inks heuristically; do they have a reputation for harming fp's? I have been advised to stay with Diamine because of safety concerns; nevertheless, Diamine appears to be too unsaturated and watery.