Just collecting imagens to show some of the possible varieties of these systems used around the world.
|F1B - Paulo Solon 1980|
|Radoczi Nandor OT glider - just bending aluminum plate to adjust.|
|Drift a Long A1 Nordic Glider from http://bikinipl.blogspot.com.ar/|
|single position rudder adjust system from: bikinipl.blogspot.com|
|System prototype for O.T. glider|
|DIY- From "U" aluminum tube|
+ info: evoo forum topic