All the things Paul wrote down earlier plus :

The profile of the wetted part of the rudder is the same as the ones you tried in the pas Tim. So steerage should be very comparable between the two. The stocks are made out of bend aluminium square tube and look/feel very stirdy. I THINK the rudders come with a manually adjustable nut (with wings, wingnut ?) so that you can adjust to amount of stick when the rudder lock down arms are disengaged. This means you can unlock the rods and keep the rudder boards down. Thus you sail through the surf with full control and at the first sandbar they kick up with a very small amount of pressure. When the sandbar is in THAT shallow water it means that you have succesfully traverse the surf anyway and the big rollers are behind you. This is actually a very nice feature and I've used it myself alot when coming in. It can also be effectively used when going out. It is simple and effective.

The rudders can be turned all the way up. This can indeed be used in the surf again or when the winds are really light but the orginal intend is to have the boards out of the way of the feet of clumsy people. Not to mention their shins. It is a way to reduce risk of damage while the boat is parked. Personally I like this feature alot as well.

I've seen these rudders and stocks being developped as Hans is quite near to me and they are in my opinion pretty well designed. I haven't sailed with them yet though, so give my some margin. However, I do believe they are better then my current AHPC setup and I'm quite happy with those already.

Wouter