On my micro RS4 I have something similar to this coming from the battery and into the ESC. Basically it's a large capacitor that gives the micro a bit of a punch after coming out of a turn when you first punch the throttle. I'm not sure how you would wire this up on something like a Zip Zap because you cannot isolate where the "speed controller" is on the board. The cap needs to be by the input voltage, not the output where it goes to the motor. Frizzen sounds like he would attach a cap to a similar type thing on the board? Is that right frizzen? Oh and it really does make a difference on the lil micro, it just totally burns out when you punch the throttle!