I called Craft Supply to ask them how to remove a transmission from a clip retainer on a Patriot. I recognized the techs voice and I told him that I never had any luck with the Dr Kirk's even after using it another 5 or 6 times at high rpms (like he recommended) . I told him that I wasn't going to return it because, I would only net $7 after shipping, and that I was going to keep on trying. He said, "You know what, I am going to issue you a 12.95 credit." I told him three times that I wasn't going to return it and maybe I was doing something wrong. He insisted. They really stand behind their products.