David I applaud you for coming on here and admitting an error so it could serve as a cautionary tale for the rest of us. I've been in RC for 26 years and I lost track of how many guys got a "radio hit" shortly after take off on the first flight of the day and lost a plane only to find out later that they plugged something in wrong. I take two things for this 1)preflight is critical and 2) the more complex our radios get the more careful we need to be when programing.