BOC. I have 14 Driftmaster DuoPro's 1/2" on my SeaArk, but I have been reading a lot about PVC rod holders and all the different applications. I am putting these pictures of a set up I built for my buddy's Bass Tracker about a year ago. We have used the back holders a lot on the Arkansas river. We have never really needed more than the bungee on each end. The front holder would be good for lake fishing, but he is using it tomorrow turned 90degrees for drifting on the river. Again, 2 bungees will be enough to keep it in place. The PVC is obviously slid down over the seat poles. If this idea has already been posted, I appologize, but do hope it gives someone an idea to work with.