External BEC needed for RX8 high voltage/Mech brakes?

[BrianG]

Actually, changing to a weaker one may be worse. A stronger servo will be able to move the linkage easier, while a weaker one may be stalled and actually pull more current.

Running a switching BEC on lower voltage makes for reduced efficiency. I've never tested the Tekin BEC specifically, but all other BECs I've tested (Koolflight, CCBEC, DimensionEngineering, etc) tend to operate more efficient (and cooler) with higher voltage.