Thanks for the response guys. Maybe it was just bad luck with our servo breaking. The splined output shaft broke clean in half when my son crashed it into the wood shed. Ive never seen that happen before Ive seen a HPI SF-20 servo for £23 - this gives 6.6kg/cm @6v so is more than enough but I have an old futaba servo to bang in 1st so will see how it goes with that. And when I say old I mean OLD!! It was the steering servo in my original Hotshot in the 80's!!!!