O.K., I know most of the fish finders are designed to mount to a boat, but are they easy or better yet compatable to mount onto a railing to the frame of most kick boats? The pics of fish finder mounted kick boats on this page and others appears to show the units mounted onto a factory railing. Can it be done without buying additional items? I am planning to buy a Trout Unlimited Colorado Pontoon Boat and wish to mount a Humminbird Piranah series or the Eagle Cuda series onto one of the front railings.