On the 144 Solitaire Carbon the cap, by design, does not hold securely on the barrel and can leave scratches; an inserted piece of paper can serve as an improvised solution; a real fix does not exist. An engraving cannot be removed subsequently; replacement of the cap sleeve is only possible if it is significantly damaged; a service flat fee 2 covers cap exchange and general overhaul excluding nib; an individually purchased cap is significantly more expensive. On sending in, it should be stated that no new engraving is to be carried out. A nib exchange without a stamped service booklet requires assessment by Montblanc and an individual cost estimate. The piston mechanism with seal change is also handled via the service flat fee; concrete amounts are quoted by every boutique.