Looks like I bought one of those "the more you look, the more you see" boats. After taking off the rotted plywood, saw more corrosion than I was expecting. Does it look like I'm ok to just sand off the residue and bolt my new transom in, or should I be concerned about the condition of the aluminum? If it makes a difference, it uses a jack plate to raise up the long shaft Yamaha and the transom cap is cracked in a few places (will replace). Thanks!