JC, You are on the right path. You can drill all the way through slowly, or you can leave the shank out some and try to pull the rivet through (suggested) which will not always work. When it does not work, you will have to punch the rest of the rivet through the hull. The remainder will be in the boat in various areas. You will find some of them shaking out that you miss, and you can try to use extensions to vacuum some of the areas out. BCB