ok i got a couple of BEC questions. right now i'm running a Savage Flux HP with TCS crawlers 5th scale TVPs. i want to upgrade to a HV servo. prob a savox or hitec. anyway heres where the questions come into play.

-Does anyone sell a standard BEC that i can buy and just wire up? i'm good with some basic soldering, but didn't really want to mess around with creating my own from scratch.

-i've seen some bypass harnesses that will let you power the servo straight off of the balancing port of a 2s lipo. this could work for me but i'm running a 2s/3s lipo setup in series. would the extra battery drain from the servo throw off the 2s pack over time? affect my ability to run 5s? what about the balance of the cells?

out of the two scenarios above anyone recommend one over the over? any other BEC setups i should look at?