Servo power through PX4

I am trying to understand what is the best way to power 2 servo's on a flying wing that will be used as the platform for learning Mission Planner and APM:Plane

I plan to use 2 digital micro servo's and power them off the ESC's BEC. I was planning to use a Hobbywing 50a V3 since it has a very strong BEC that will not brown out with the digital servos.

Is there any issue running the BEC Power directly into the PX4 servo power plug?

Is the Hobbywing's BEC overkill for 2 digital servos?

Thank you

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