Yes those are hammers get loud , i used it to remove the junk fenders from my car hauler last month , i just with i had a diffrent bit holder than the spring , im not shure if you can change them out or not ? I read that link to cowl repairs im not shure how that glue works the website for possible patch panels dont work I guess ill have to check all of those pages on Roberts build unless he wants to e-mail me pics of what he done . Ill probally farm the welding out , i dont trust my skills to welding body pannels with a torch and i dont have a tig or a wirefeed , Any one live close to me ? I know maybe one guy that maybe can but im not shure of it . Im guessing the sheet metal from my old trailer fenders would work good for it ????