I would change servos...see if you can find someone to let you try a couple higher end servos and see if it fixes the problem......i had 2-225mg's on the v-tail of my pilon plane with a ttpro40 and lost the plane due to the servo's......i had one crap out on me and since i just bought them my LHS just swapped them out for me for the same servo....when i flew it again another servo went out and i lost the plane....not saying 225's are prone to failure and definately not bashing but i wouldnt trust another plane to these servos.....just my .02

P.S. Im still running 925mg's on my chopper with no problems....so im not bashing hi-tech