I'm using a receiver pack. I'm thinking about switching out the futaba servos for the BK servos on the E5 that is running a bec. That won't be for awhile, I want to take advantage of the summer and fall flying weather. I came close to running the new torq servos on the cyclic but wanted an easy fit. Plus I was sold after a great talk with Bert about the servos. I sold a goblin 500 so I could buy the E7se and the guy who bought the g500 had an issue with the bk tail servo. They initially said to send it in and they would exchange it, but then they wrote back and asked for his address and said they would send him a new servo in addition to repairing the other one he would send in. That confirmed by decision even more.
