Dumb Castle BEC question

[BrianG]

Thanks! I just gotta learn to be less "wordy" to get my answer on the page before a dozen other answers show up.

TBH: I wouldn't want to hook any UBEC to only one pack because then that pack will drain slightly faster and the dual packs will take longer to balance out when charging. If HV is what you want, then a HV UBEC or a receiver pack would be the best option IMO.