First, the engines on a Legacy will probably never be overhauled if its flown as sparingly as some Legacys are. You are right the TRs are not overhauled on brake usage and they are OC just like the engines.

You are probably on the Rolls Royce Corporate Care program if overhauls are covered. Corporate Care is essential in my view despite being $10-$13K a month because there is nothing cheap about repairing one of those engines.