Here a picture of the system as seen on a Taipan 4.9 (F16)



Rolf, the system is handy when singlehanding. With one short and sharp pull perpendicular to the line both boards can be pulled up or pushed down. It is handy when rounding a crowded mark. In the picture only the uphaul line is fitted.

Alot of crew want to pull up their board when transitioning from upwind work to a reach or downwing leg; this tends to calm the boat down. Boats with long daggerboards can feel trippy on these courses with a fully set board.

Wouter

Seems to me when sailing in areas that have grass it would be quite nice to be able to cycle the leeward board without having to go there.