The CL257 works pretty well. I fit them to all my boats. Essential piece of equipment for those of us who race in tidal estuaries or along the shore of places like Broadstairs. They save a whole lot of damage from those rocks that suddenly stick up a foot above the surrounding seabed.
Hi Pascal, I have not heard of anyone fitting that. The option was added to the Class Rules early on for those who regularly sail through areas of potentially shallow water, especially muddy estuaries where you can not see the depth.
An alternative is to lean back and uncleat the rudder downhaul whenever you think you may be at risk. With the rudder bolt at normal tightness the rudder will only tend to start to come up if you are planing.
