My fiberglass man said to replace all the underneath metal, pull the shaft, and he would reglass everything. How do I begin to remove the metal??? What does the underlying support skeleton of the boat look like? The metal is pitting and even the set screws in the back are so corroded that it would be nearly impossible to turn them. Where do I start???? How much should get removed??? Does the strut continue underneath the entire 33' fishing vessel?