Since I didn't like my other rod holders, I pulled them out, and decided to make my own. I made 6 of these bases out of some 3/8 thickness, 4 inch wide aluminum bar. I drilled and tapped a hole for a 1/2 inch bolt or threaded rod in the middle, and then installed it with 4 3/16 rivets, which I countersunk. I have 1 on each of the 4 corners of the bow deck, and 1 on each side of the stern deck. More to follow on the actual holders later.