Back in the day I planned to install the daggerboard uphaul line on my Taipan F16. However I never did. I'm now 4 years on and I haven't needed them ever. I have the low aspect boards and I always keep them down. The boat seems to like that under spinnaker, it picks up faster and reacts better to the rudders.

I have no felt lining in my daggerboard wells and my boards always slid down or floated up till I installed my own version of the retainer bungees. It looks like this. I have a steel ring on either side, one that can slide along the side stay. I have a bungee with a plastic hook tied to the head of my daggerboards. The hook hooks onto the ring. The forward pull of the bungee tries to tilt the daggerboard forward and as such jams the daggerboard trailing edge in the rear wedge of the daggerboard well (on the keel). This is sufficient to keep the boards were they are irrespectible of how rough the conditions are. When the boards are raised the ring slides up along the stay and as such maintains the forward pull at a constant level. When the boards are fully down then I hook the rings under the protruding part of the pins I use to secure my sidestay chainplates. Either that or the I hook them under the chainplates themselves. This setup works really well and I'm not going to change it. Best of all I like the fact that you can easily move the daggerboard up and down by just grapping the board and pulling it a little back against the force of the bungee. This "unlocks" the boards and makes it slid up and down as if there is no bungee retaining the board. When you let the board go then it immediately locks it into place.

Cheap, simple and effective.

Wouter