I have had the worst luck with the new Parkzone micro/mini servo's found in the smallest RTF planes and heli's. First my Citabria lets go of the rudder in mid air and then the Sukhoi rudder follows suit the same day. What are the chances. I found replacement MCX servo's and was able to fix the Citabria but the Sukhoi has the servo go full deflection in one direction and that's with the new servo. Not good. This stuff is just above toy quality and I'm not purchasing any more of it. Just too fragile for me.