Mikefriend

I have looked at so many diagrams for H28 but am bamboozled by the math and equations. Seems like it's vital to get size of trim tab abf vane correct relative to each other and rudder. I'm not going to spend money building something only to find it doesn't work. Any ideas that might be useful?

I’m looking to make or buy a wind vane tiller steering system for my H28 Yacht. Has anyone any ideas/plans/photos

Is this still available?