I built my own hot wire kit, base on the gnttype.org instructions. Except I used a factory gm relay and weather pak connector. The caspers unit sure looks nice. I imagine you could build the hot wire kit using the radio shack relay, but I wanted mine to look like it belonged under the hood. My alky kit uses the same relay and weather pak connector. By the time you purchase the wire, relay, relay weather pak connector (with wiring), split loom and connectors, you're better off buying the caspers unit. Approximately the same price. So, if you build it yourself, then all you get to do is claim that you built it yourself. IMHO, save the trouble and order the casper unit.
