We have a 21.5 ft open console, that unfortunately has not rold holders anywhere. I was thinking in drilling the borders of the hull to install 4 embedded inox rod holders, 2 on each side. My questions are: will that degrade the structural strenght of the hull ? should I instead install plastic rod holders that attach to any surface inside the hull ? ...If inox embedded are the way to go, how is the best technique to make the angled holes?