I was asked to help a guy out with his plane, a Four Star 60 with a new Saito 100. The plane had flown before, he swapped engines and radios. I dialed in the engine and did a pre-flight, Up elevator, right rudder, Right aileron. Everything fine, so he taxied out and flew the plane. Immediately after take off, he started shouting about reversed alierons. ??? Amazingly, he managed to get the plane back intact. First time I have seen this happen without destroying the plane. (I attritibute this to the wonderful flying Four Star and a LOT of luck)
Since I had helped him, and the controls had all moved to their proper places, I was quite upset. Before he even touched the plane on the ground, I said "Give me RIGHT aileron." Sure enough, the right aileron moved up. Still puzzled, I had him do it again, this time I had him hold it and looked at his transmitter. He was holding the stick FULL LEFT aileron. One week later, he was again getting ready to fly, I walked by and said "Give me right aileron" this time the right aileron moved down. He was still holding full left. I now call him "Lefty" In the future, when asked to do a pre-flight, I will now hold the transmitter myself.