Sorry it didn't help, but I didn't think it would make a difference

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The Watts (power) to the motor is the Voltage X amps current. The motor specs from the ads are 16A and 29A max, so at about 10.5 to 11 Volts (what you'd expect from a 3S LiPo), that makes about 176 and 319 Watts max, respectively. It would be nice if the ads gave you some of these numbers but they never do.
ORIGINAL: Friday_2006
So Osterizer you are right. Voltage wasn't the source of my problem. Tried to play a little by moving the servo front and back and seemed to cure it a bit, but didn't eliminate it. Tail travel is ok, It goes from far left to far right without binding.
Today i ll try to setup tail and head from the beggining and see if that problem stops.
16A max for the one vs 29A for the JGF. 29A will be about 300W
Can you tell us how you did this calculation ?????
Thanks !