I have completely gutted my early 80's sea nymph bass attacker and found 3 cracked ribs in the bottom. The cracks are right at rivets and my question is should I drill the rivets out and put new ones in before welding up the cracks and rivets? Im afraid if I drill them out and then let them weld the cracks there will be an uneven hole or surface to put the rivets back in. Maybe they should weld up the crack and the hole entirely and then I move over a quarter inch and put in a new hole and rivet?