Good post MTK. Another is the Wike IBEF (ignition battery eliminator/ filter) which i am running without issue in a 3D hobby shop 72"Extra. Where space is not an issue (30% and larger) I still prefer a dedicated system with redundacy on the flight control side. Kinda provides a security blanket
If one is intent on flying precision, voltage regulation insures that the servos are operating at the same voltage at all times therefore they respond the same regardless of any change in battery pack output.