You can use the micro switch. If you mounted the Cruise Commander in the engine you only have to wire the switch to the chuff in pin and one of the ground pins. No need to run wires to the RS board in the tender. You will still only get two chuffs because the engine has a two lobe cam. The smoke is synchronized because the axle cam also lifts the smoke unit piston.
If want 4 chuffs per rev you would have to use something like John's chuff generator in the engine. Otherwise its reed switches and magnets in the tender. You lose synchronized smoke since the cam still drives the piston. Only way to to get 4 chuffs and puffs is to replace the puffer unit with fan smoke unit and even more circuitry.
Pete
