I have another question a little off the subject. I bought the H9 P-51 PTS and upon recieving it I put the motor on a run in stand although it isn't neccesary. Almost immediately It was making a very un-nerving knocking sound. I've run alot of different type motors including offroad race motors and this was new to me. So I called Horizon to see if they had any answers and they said to run it awhile and see what happens. Well after a gallon there was no change so I bought a .46nt and put it on the stand. It ran fine with no problems. Now I've got about 4 gallons (flight time) on it and it is making the same noise as the original motor was and is progressively getting worse. It is most noticable when just above idle. If you blip the throttle it will do it briefly each time and if you hold it just above idle it will do it constantly. Has anyone heard this before or is it just my luck to get 2 motors with the same problem? lol

Thanks Shane