New poster here. 1962 Lonestar El Dorado. Hole is in bottom of hull from factory marine head. Hole is 1 1/2 inches diameter. I have drilled out 24 rivets and now have 25 holes including big one. I have read lots of ways to fix this. Best is welding but for me that is 200 mi just to see if they will do it. So. I plan to sandwich the hull between two 4 " plates of aluminum through bolted with stainless 3/16" bolts and nyloc nuts filling the middle with 5200. So I am not near any boating supply, and nearest marine dealer is 100mi. Does anyone have any problems with this fix. I know I am asking for it but be gentle. Thanks again. North.