Rick,
When my shift knob came off my hand careened (sp) into the fuel pump switch (that is the aircraft type with the cover) and I turned my fuel pump off. I didn't even know it for a few seconds after I got stopped off track.
Here is Marks web site.
http://www.toploaderheaven.com
I believe that David probably has the same type of shifters as Mark. You may want to check out Marks Pictures and see if your shifter is like one of the ones he has.
Clois