I looked into the ZINC sacrificial "thing" and it seems to not be viable. Its used in water heaters, sailboats, many places ... so I might have come to the wrong conclusion? However, if all you had to do was bolt a mass of metal to your frame to solve corrosion, wouldnt that be routinely done? There are some galvanized parts on the Expy in key locations so that seems to work in those spots.