Greetings again everyone. I wanted to throw this out for suggestions; our vessel is a Seafarer 34 with a centerboard. The centerboard trunk top is below the water line and the line that raises and lowers the board is also enclosed in a tube below the water line. I have ordered a specialty stainless steel alloy to fabricate a plate and elbow arrangement that will be bedded into the trunk top and act as the mounting point and final bend for whatever tubing material houses the line or cable. Originally the vessel had standard copper tubing but I do not want to use that because it will attach to stainless and I am worried about the electrolysis action with the two dissimilar metals. I have been considering a plastic like conduit as this will eliminate any corrosion threat. The tube travels aft approx 8' then makes two 45 degree turns to bring it to the cockpit. There are flexible conduit elbows that would be perfect. Does anyone see an issue with this or have a better suggestion. I would go all stainless but the alloy I am using is super expensive and other less expensive options are subject to crevice corrosion. I would be threading the conduit elbow together and am still looking into an adhesive, or perhaps West System G Flex at all joints? The control line will most likely be Dyneema. I have considered all other metals and plastic seems like a viable option here. Unless someone can tell me 316 stainless is a good idea I don't know what else to do?