Now that I'm going to have to check out.  I belive that mine is a round
knob, but if not your suggestion sounds perfect.

>
> I have a 1/4" drive, 7/16 -12 point socket on a 1/4" drive socket
> screwdriver. This fits over the propane knob so you can crack the
> valve without touching it, and close it.
> Cheap and easy.
>
>