Finding TDC on VW air cooled engines for valve adjustment and distributor orientation.

Here's how to find which cylinder is at TDC (top dead center) on the compression stroke, ready to fire, without using the distributor rotor direction as a reference.
This method can be used to verify the cylinder which is ready to have the valves adjusted (opposite the overlaping valves). It can also be used to determine and/or confirm which cylinder the distributor rotor is pointing to in case of an improperly installed drive gear or when installing a new or different distributor.
Valve covers will need to be removed for this procedure, but it is a failsafe method for confirming which cylinder is firing at tdc.
Set the pulley / crankshaft to the notch. depending on which type of pulley you have and how many notches it has, this is a good starting reference point. . Turn the crankshaft back and forth a little bit. Look for the valves overlapping in their travel. The opposite side is the cylinder at TDC. Example: if #3 valves are overlapping, #1 is at tdc firing. I hope my talking in the video explains this clearly, and that the video shows what I'm blabbing about.
While a 36hp engine is shown, this is an accurate way of checking an air cooled Volkswagen engine.