I have a 37’ Roamer Riviera express in aluminum. Purchased her in the water in VA, have had her out of water in TN fixing things. I have a problem I would like help with, concerning the aluminum hull. A previous owner installed trim tabs. He used 16 threaded 1/4" bolts to attach each trim tab at the bottom of the transom. The tabs are straight edged where hinged, and to accommodate the difference between the straight tabs, and the curved surface of the transom, the installer filled the difference with 36” fillers 1.5” thick, curved concave on the side facing the stern, and straight where receiving the tab hinge. Each tab has a filler with 16 holes, and the transom has 32 holes in it, where the bolts are threaded through, and there is not so much as a nut on the bolts inside. 32 holes below the water line filled with screws merely threaded through the hull!! Now get this: the fillers are made not of aluminum; not of steel, but of pressure treated wooden 2X4! I could not believe this. Making matters worse, I twisted out the bottommost bolt and after ½ turn, collected rainwater in the bilge began draining out! One half turn of a bolt (1 of 32 bolts) away from perhaps sinking the boat. Loosening several screws, it also became apparent that the filler was improperly shaped (too thin), and thus tightening the screws was pushing the straight edge of the steel tab, making the tab act as a reverse spring working to loosen the screws! My first question is, what is the best way to remount these tabs and repair the through-hull holes? All 32 of them, plus about eight more for the other end of the cylinders, mounted to the transom the same way. I really do not want ANY through hull penetrations for this type of thing. I am thinking using the wood fillers (with correction of spring action as to hinge) as mold for an aluminum replacement filler to be welded to the hull, with threaded bar welded to the new filler to match the hinge. Any other thoughts or ideas?