Hello, Before giving my opinion on your site for the Amewi Buzzard Pro XL electric helicopter product test, I wanted to know if you sell spare parts. I would like to know if you sell spare parts such as the rear rotor motor which still burns after a dozen flights because it is brushed and not brushless. after a dozen flights, because it is brushed and not brushless... What is the part number of this rear rotor motor and where can I find it?