I have flown my bipe several times now and I am finally satisfied with its performance. For the first 5 or 6 flights, after my fuel tank is almost empty, my plane would "glitch" either roll over or I would lose total control for about 2 seconds. At full throtle 2 seconds is a lot of time. I checked all of my electronics and they seemed ok, but the high torque aileron servo seemed labored. My battery pack seemed ok and checked out fine. Another pilot at our field was having similar problems and we sat down and discussed what the problems may be. We ultimately came up with bad reciever packs. I did away with the 4.8 volt pack and built a 2500ma 6 volt pack and ta da! problem solved. I have about 5 more flights on my plane now and no more glitches. I guess the chore of moving 4 control surfaces on my aileron servo was killing my 4.8 volt pack. For now I will leave my plane as is, but this winter, my plane is getting 2 aileron servos. I have the plans and traced all of the parts, so maybe I will just build another wing. For those debating on what to do, If I were to do it all over again, I would definitely put in 2 servos.
Just my 2 cents.
Tim