I just got a Pilot Custom that is from 1977. The nib looks clean on the outside, but it won't draw ink continuously. It's been submerged for the past 3 evenings, but it won't write from a cartridge or a Con-20 for more than a few strokes. I'm not a repair person and have seen scant information about how to disassemble and troubleshoot.

Does any know of a reputable repairperson that could take a look, and hopefully fix this? I'm in NYC. I don't mind shipping it.

Thanks in advance.