Rookie, you did not understand what I said. I would NEVER recommend drilling holes in a boat to solve an issue storing a spare paddle.
No holes get drilled in the boat to use the plumbing segments. You put holes in the plumbing pieces and run bungie line thru them. The issue that I mention above is the bigger one, finding the right sized and shaped piece of plumbing for a GP. It can be very secure, some folks were using it in surf where securing splits can be challenging.
In my case, I was unable to secure a GP towards the front of the boat via bungies without having other issues towards the bow. You can use plastic tubing to stiffen perimeter line if you can figure out how to place a reachable loop or small bump up between two RFD’s. It at one point was a popular way to create an easily grabbable spot for a bigger guy with gloves on between two RFD’s that could be close together. That was some years ago, it fell out of favor and of course it requires rerunning the line . But it can be a useful tactic for some situations.
My older britches may have one more attachment point. Would have to go down and look.