I recommend toolmaker for any electrical connection. test results are out there. I like to use murdermat but then again I think there out of business at his point. I won a lot of there matting in a giveaway and still have about 90sqft left of 90 mil with 70-80 already in the car. My converter cracking actually helped me gain the effort to rip everything out and put the 3rd run of sky high in. oh boy