check it out. I built this rod holder set up this spring for my bass boat. I used 2″ inside diam. pvc but you could tailer it to whatever size rod you use. I didn’t glue the tops becuase then i can still swivel them. they stay in the boat just by the 2×4 T section but i throw a rope across just for good measure. It is super light and goes in and out of the boat effortlessly. To attach it to the 2×4 you need to get a steal floor flang from. Print this picture off and take it into your local hardware store and they’ll help you out! you could also expirement with different base heights. Hope this helps some of you. I think total cost of EVERYTHING comes out to about 6-7 bucks each (four rod holders)
Kevin (NB)