I had a number of small glitches when I ran my antenae in the tube. I used futaba digital servos and a futaba FM receiver. The plane would fly perfectly and then glitch and recover. I ran the antenae into the front of the plane away from the digital servo lead and the problem was gone. If it slips near the leads bang. Be careful if you have digital servos with the antenae lead. I have not had the same problem with analog servos in a Ucando with similar dimensions and servo lead lengths.