My father recently gave me his Mont Blanc, which is on the order of 20 years old. The band says "Meisterstuck" but it's not the fat one that opens with a wrench; it's the skinny one where everything appears to be friction-fit. It comes with a threaded piston converter that screws in place.
He left it sitting, filled, for around 5 years before he gave it to me. I soaked the section/nib for days, periodically flushing with a syringe jabbed into the back of an empty cartridge, and also using the converter to suck water through it the other way. A lot of solid black chunks came out, but I can't get it completely clean. It writes, but it's not breathing correctly; the flow stops after a few minutes.
The question is, should I take it to the repair place in Boston and let the pros have a go? With cheaper pens, I don't hesitate to tear into them and even modify them. After all, I used to build motorcycles, how complicated can a fountain pen possibly be? But with a pen this expensive, I hesitate.
Is there any weirdness I should know about the way these are put together? I know from my girlfriend's BMW that Germans like to do things their own way, which is often different from everybody else's way. For instance, is the feed glued in or something? And if I *DO* let the pros handle it, since I can't take it apart myself, does that mean I need an ultrasonic cleaner like the kind they sell for Rapidograph pens? (As an ex motorcycle guy, I'm naturally leery of any mechanical device I can't take apart)
TIA for advice,