A self-repair of a Montblanc 146 is basically not recommended, since special tools and several years' experience are required. Especially the newer 146s are difficult to repair, so they should rather be given to the specialist retailer or directly to Montblanc. Montblanc often exchanges such parts without problem within the warranty. A simple gluing on of the broken-off ring is not advisable, because this component anchors the nib and is sealed with silicone against the housing.