I want to add a fourth Garhaurer clutch to the current bank of three. The four stainless bolts that feed through the aluminum spacers horizontally that hold the rope guides are frozen due to galv. corrosion. I have tried various penetrating oils and also tried pressing them out with a large C-Clamp ( bent the C-Clamp). I do not want to try heat given the close proximity to the deck. Any ideas on breaking free these seized bolts??