Hi, I just got a Jeep zip zap, and I noticed something to go along with bad companys spring suspension discovery. I have one of the zipzaps when they first came out and the new jeep performed so much better than the original one ever did. I looked at the resistors on the pcb of the jeep and older civic zip and found that the color code changed. That must be why it performs so much better, ill have to get some resistors from my digi electronics class and swap the old ones out!