I need the know how!! Looking at installing some of these lights for a few clients that have requested this service. I need to understand how to make a clean break - say from peak to opposite peak and then down the window. I have seen an out of town crew and install with 2 guys, couple hours, looks are neat, clean, sharp, and space about 6 inches apart. Although you go buy and you don't see a wire, a cord, nothing. How do they do it!