On my Kyosho mp 7.5 kit.I am using airtronics 358 for steering and 161 for throttle.Last night I thought I would take my ofna hyper .21 8 port off my t-maxx and put it on the Kyosho cause the kyosho still needs an engine and pipe,reciever.Well last night I tried to drive it in the garage,and it would steer one and and not the other.Then when you take it off the ground it would steer both ways.Then the engine would rev without me working the throttle.The engine would rev by itself anytime but it only revved once when I was putting it around the garage.The 161 servo for throttle is making a humming sound,my LHS said to take it apart and fix a gear in there or something like that.Also the wire for the steering servo goes right beside the throttle servo.I don't know if thats the problem or not.I also have blue aluminum servo horns on the servos.At first I thought it was the batteries,but then I put in 4 new AA's and it did the same thing.So the only thing I think it is,is the wire right beside the humming throttle servo,or the aluminum servo horns.