Dutchman
I have a Dutchman on my 33". It was installed by a previous owner. At first I was not too impressed. But after two years of sailing with it, I love It.It has two monofiliment lines that thread through holes in the main and run perpendicular from the boom to the topping lift. No I don't have a full batten sail but the manual does have instructions for installation on one. It has a lot less line flapping around then you would have with a lazy jack. It does not interfer with sailing in any way. If its not blowing any more then 15 kts., I just let the halyard go and the sail flakes itself, and I stop 'er to the boom.The down side is that you need a special sail cover with velcroed slits to fit around the control lines and you have have to put holes in main (mine have reinforced patches and sewn gromets). Proibably not the cheapest solution. I am not an employee or had any interaction with Martinus Van Breems, Inc.But they have a website. Check it out.http://www.mvbinfo.com/Scott