Hi Yadac123, Thanks for the reply. At the moment I am only trying to trim my heli. As you would have read, my heli would not have been able to fly because the grub screw on the axis was loose and the main gear was just spinning. I had to order another axis gear from my supplier. They supplied it at no cost to me, which I appreciated. I live on a farm and as far as I could assume there wasn't anything in the near vicinity that could have caused interference. I was very aware of this after the first time it happened. All I am trying to do is get this problem solved so I can enjoy this hobby. I have a Walkera 4 and have learnt a lot with it and buying the eagle 50 was a step to collective pitch.