Dirt simple:
http://www.mykitlog.com/users/display_l ... 131&row=34http://www.mykitlog.com/users/display_l ... 979&row=15http://www.mykitlog.com/users/display_l ... 8790&row=7Knob pushed all the way in = fuel ON, and does not protrude into cockpit. Knob pulled out = fuel OFF. Can see at a fast glance whether fuel is on or off.
Since the end of the rod is threaded, and the center of my panel is removable, I can unscrew the rod from the rod end bearing and remove the center panel in about 10 seconds. I originally made the rod from aluminum, but after 4 years the threads I tapped inside the rod were getting loose, so this summer I made a new one from stainless steel so it should last forever.
In the photos you can see the rod simply going through the panel. After 3 years the hole in the panel was starting wallow a little, so I enlarged the hole a bit and added a plastic snap in grommet. Now it slides nice and easy and should last a very long time.