RE: Heeellllppppp.....
I had the exact same problem but it was happining with the throttle I fired up my mds 58 and it just went bang straight to full throttle some times it would work but it was delayed and it would also twich like hell and being an mds it was very responsive to the slightest throttle change but that was the only hitech servo I had on it and the rest were futabas so I took it out and and cleaned the small plate inside and it was better but still not reliable I think I changed it over to the rudder and it was ok but I just took it out any way and put a futaba in no problems since I had a metal rod for the throttle that could have been something to do with it I would get some other servos try them if it does not work try to get a shot of a reciever at the field and try the new servos with that I think one or the other will work good luck