With strongly deformed nibs, there is the risk that during straightening the iridium tipping breaks off, so that the nib is anyway mostly no longer usable. Specialised repairers like Horst Maxenberger (maxpens.de) offer to look at such nibs in advance based on photos and assess them. Montblanc generally offers in service a flat-rate nib repair (around 49 euros) or a complete nib exchange (significantly more expensive); before an exchange, the customer is usually informed.