Receiver packs

[BrianG]

@redhatman: Yeah, pull the red wire. The only exception is if the ESC does not even have a BEC or if the ESC has a method to disable it with a jumper or something.

@MM: I'm looking at servos right now for the Hellfire truggy and figure something with good torque would be preferable. I have a Hitec (5945 or something like that) in my Revo right now, but there seems to be some play in the steering. Appears like there is slop in the gears. I'll try replacing the gear set but if that doesn't help, it looks like that will need a new servo as well.

A little off-topic, but related to servos: Since these servos use a simple potentiometer for the feedback, about how long do they last before they lose their accuracy. I'm wondering if the pot is simply worn.