Richard Binder is the Guru of fountain pens. His web site is a treasure trove of information for the fountain pen collector and repairer. I've been collecting and repairing antique fountain pens for over 15 years and and I have three "go to" information sources.
- Fountain pens, The complete Guide to Repair and Restoration by Frank Dubiel (known among collectors as"Da Book"
- Pen Repair by Jim Marshall and Laurence Oldfield
- Richard Binder's website.
Al lthese resources will provide fountain pen makers with loads of ideas for different filling mechanisms as well as solutions to problems of flow.