With ink leakage at the threads, either a leaking screw connection between grip section and barrel or a crack in the reservoir is to be considered. Limited Editions are only repairable to a limited extent: Montblanc does have spare parts, but their availability is limited, and repair flat rates for LEs are significantly higher than for regular models. In the case described, a cracked ink reservoir was indeed diagnosed; the repair cost around 403 euros. A direct telephone clarification with Montblanc service is recommended; shipping should always be insured.