(1) As a "wet finger in the wind" guestimate from a previous ARCAM FMJ owner ..... my break-in period was approximately 200 - 300 hrs for the components in their FMJ line.
(2) If you also introduced any other new components (e.g. cables?) into the system contemporaneously, then that will add another wild card into the alchemy.
(2) If you also introduced any other new components (e.g. cables?) into the system contemporaneously, then that will add another wild card into the alchemy.