I went over the airframe with thin CA before I assembled it as I always do and it doesnt vibrate any more than any of my other 50cc planes... I just got back from flying and what do you know? I was hovering about 2 meters off the deck and my rudder stopped responding the plane pulled to the left and i just managed to avoid disaster, as I came in to land, it was crabbing to the left, but I got it down ok.. I pulled the canopy off it and found the rear aluminium wing locating rod came unglued and slipped into the fuselage and then jammed my rudder servo arm in full left position... Im so disapointed with this plane,, Id heard such good things about it, but I have had nothing but trouble with it, through no fault of my own.. Im at the stage now that I just want to strip it down and sell the airframe...