Within the first weeks after purchase, a nib exchange at the specialist retailer is possible free of charge — the easiest is to make the complaint there. Alternatively, one can send the fountain pen oneself (insured!) to Montblanc Hamburg, but should coordinate everything by telephone beforehand. After the exchange period has expired, an official exchange is no longer financially worthwhile; cheaper is then to acquire a used model with the desired nib and to resell one's own. For individual adjustments or refinement, specialists like Horst Schrage (max@maxpens.de) come into question.