TDC/Compression Stroke Spark Plug Whistle Tool

I designed this to easily find the compression stroke when setting an engine's timing. Just replace your cylinder #1 spark plug with the tool and when the motor is on the compression stroke it will whistle loud and clear, from the bottom of the stroke to the top. Foolproof in its usage. Prints easily and perfectly without supports, any material will work brilliantly, including PLA.