Hi, I have to repair hole in the underbelly of my 2011 North Trail. It is triangular, about 1 inch on each side. No idea about how I got it. It is just under the pipe for the black tank. I am hoping to fill it with handifoam sealant black after getting that suggestion from Gary in the service department. After cuttting the flush with the underbelly, I might want to tape it with something strong. Thanks, Theresa