Right now, I am using these 3M Command hook cord holders for 4 lines on each side of my cabin top.
You can see how they work in this photo…
A big advantage is that you Don’t need to put a screw into the friberglass.
The down sides are that the don’t last forever (UV is hard on them) and they need to replaced every few years. But the are Command Hooks, so they come off clean and are easily replaced. The other downside is they can’t hold more than about 4 or 5 coils of rope…so I can’t hold my mainsheet or my headsail furler line…to much rope.
For now, I am using a large Command hook, that I drilled a hole in, threaded a thin line through and tied in a loop. The loop is sized to hold the larger rope coil, and it hangs on the command hook. Sorry no photo of this…new change this year. Seems to work great, low cost, no extra holes in the fiberglass.
My other idea (which I haven’t tried yet), is to buy some knobs like this, mount them spaced out on a board that is cut to fit where all my command hooks are now, put a loop of cord on each one, and screw the boards (1 on each side) with 5 of these knobs on it. The board can be removed if any of the knobs crack or the cord breaks. Only 2 holes in the boat per side, and I bet it would be pretty maintenance free if you used starboard.
I just stocked up on 6 of the 3M cord holders, so I am good for this season if any break…so probably won’t try the knobs this year.
Good luck with a solution that fits your needs.
Greg