Dmart. You can read about others having issues with there servos glitching- jerking - If you buy a 5755- or even are using the stocker -throttle-steering, Its a good idea to use a wiring harness called - direct servo bypass. They are cheap to buy. Simply put, This by-pass harness -- bypasses the reciever- it will prevent the large current draw our large servos require from going tru the reciever- this is sorta hard to Xplain with words- Sudden servo loads can cause the reciever to not have enough voltage. this can cause the reciever and the kill switch to - spaz out- glitch- cause the engines ignition to cut in and out- A larger battery in the car helps prevent this- it is a ban-aid treatment. The Direct servo harness is the way to go, They cost about 12-13 dollars.