Took my servo back to lhs for testing and it started smoking got a new one 3 days later. Put back together went out for a bash and lost four wheel drive again grub screw came out again even with loctite on it. Like powerslave says when they go boy do they but i think CEN quality control needs looking into. I've just got a FG monster truck its not much bigger than the Genesis, if the Genesis gives me much more trouble it will be going on Ebay.