My TackTick wind has a dead battery so I have disassembled it to get at the battery. But that is now why I am posting. What has me puzzled is that the wind vane isn't attached to anything. There is the feather, the shaft and a bearing in the top cover and that is it. Nothing. No potentiometers, no RPG, nothing. The shaft doesn't go below the top cover. How the hell does it work?