@Rhaxapopouetl Wing Sung 601 I believe has a fude nib option and very large ink capacity. PenBBS has a calligraphy No. 25 nib which is a small fude, and would fit their piston fillers (I use the 456 and 495). I believe Sailor Fude de Mannen can be eyedroppered for more ink capacity.



@Rhaxapopouetl also, Wing Sung 698 takes #5 nibs, so you can move your fude from your Hongdian to that pen and it should work fine.