Hey, check out that specktrum cap, works wonders, trust me !
Also, watch what type of servo you have? i was having glitching issues, when i was using a high torque futaba servo, that was draining the current of my batteries down too low. Causing my ESC and Servo to glitch. Unlike nitro cars, that have a seperate battery pack designated to the servos, on electric cars, we have our main battery pack
good luck, keep us updated