I have my hull completely defoamed and I want to install all new cooling lines. I have never done anything like this, and need some advice! I know I need stainless, or atleast thats the best. I assume I need 3/8" but I don't know exactly how to seal it all up on both ends to ensure I don't soak this brand new hull. I'd like to get a couple seasons out of it before I have to do this foaming process again! Also, can I redo the large tubes that the trim and steering cables go through? There is a small crack in one of them, and I'd like to completely replace it as opposed to just sealing it with epoxy. Thanks.