My evidence is from pure research. You have to really look into the history of this Kit and its company before you invest nearly 10Gs on it. You have to go direct to the source for this information, and thats why no one has truly clarified this topic. I've spoken directly to a number of different direct and reputable sources that I can not reviel for confidential purposes. But trust me, these people are high up on the car industry food chain that I've befriended to attain this info. Hey if you own a Z you represent a little yourself, and I thought it was just right that I help you guys understand what the situation was.