I am installing a Winegard satellite dish on my MPG 185. The instructions specify that #10 screws be used (3 per each of the 4, aluminum feet) and that 'approved' sealant be used. Does Heartland recommend any particular sealant be used for antenna accessories on the roof? The unit weighs 14 pounds (Winegard Roadtrip Mission antenna). I am hoping that the #10 screws, that are provided by Winegard, are the proper fasteners to use.