Last weekend ran 8.80's at 165 with my Jack's Drag 1000 Build. Clutches were slipping! Called Jack's, couldn't believe his customer service. He said that he would take care of the problem. Wow, that was good to hear. In this time and age, customer service is a four letter word! Jack came across very knowledgeable about his product. He handled the situation in a professional manner. I would recommend him to anybody!