I'm baffled about the mold and welded aluminum const as well. What year is the boat, I wouldn't touch that boat for anything in the world. I reconise the car in the brocure, which is a Lambo Jalpa which was built from 1982-1988. My son has one in my garage a 1983 and its been nothing but trouble. Spends more time in the shop than on the road. More of a money pit than a boat.