I have a SUPERSTAR EP, WITH A MAGNETIC MAYHEM motor and GREAT PLANES GD600 gaerbox. I fried the original speed control. Replaced it with a GREAT PLANES 30AMP MINI. The first flight was fine, after the second flight the motor seems to have a sputter, on full throtle it's fine anything less it starts cutting on and off. The motor doen't stop it just sounds like it has an intermitent connection. While i hold the plane and give it gas you can see the alerion servos start to move(shake,twitch) All of the solder joints are fine. Now, if i disconect the aleron servos it fine, no cutting out of the motor. From a sugestion, i wraped the speed controler with aluminum foil. Again the first flight was fine,then after that it started doing the same thing.

CAN ANYONE HELP ME!! I THINK IT'S NOISE BUT NOT SHURE WHAT TO DO. I CANT MOVE THE SPEED C ANY FARTHER AWAY FROM THE RECIEVER. OH! I FORGOT TO SAY IT NEVER DID IT WITH THE ORIGINAL SPEED C.

your problem is most probably the aileron servos and especially their leads.
you can use special chokes placed on the aileron wires near the receiver.
these come in different guises. some are just rings trough which you coil the
servo wires around (if youhave xtra length of aileron servo wires
alternatively electronic supply house have a split suppression filter that you can clamp around the
aeron servo ires again near the receiver.
wrapping the esc without grounding is of little use.