Hi, There some fountain pens that I have noticed their nibs have a hole in the base of the nib, on the opposite end to the tines and the tipping material. See figure below: http://i1376.photobucket.com/albums/ah12/phzervas/31F9046E-38A4-4ED3-9E99-E62F82501738_zps5pundsne.jpg Does anyone know wha...