[kwaltersmi]

I just received a new Windex 10 Sport windvane for my birthday. The installation seems very simple, however the instructions don't mention how to determine which angle to set the tacking tabs at. All the instructions say is something like "Set the tacking tabs at an angle between 45 and 65 degrees." I'm assuming the angle corresponds with how well the boat points/sails to wind, but how do I determine the right angle for my particular boat? Or does it even really matter?