Talos Energy operates the Neptune Subsea Production System (SPS). The control system was (and still is) fit for purpose, but the Master Control Station (MCS) is antiquated, and some Hardware and Software are past the End of Life (EOL), but not necessarily End of Service Life (EOSL). Obsolescence management strategies can include upgrading obsolete systems but also refurbishing existing system and maintaining adequate spares for the remaining service life. Talos Energy chose to mechanically refurbish the MCS to “factory fresh” condition and secure suitable hardware spares to ensure the system remains its service for the remaining field life. The decision was based on cost, schedule, and technical/regulatory risk. The mechanical refurbishment was largely a success, and highlighted lessons learned for maintaining existing systems.