That's essentially what he was talking about at the start, he avoided it largely because of issues with setup. Putting wires into the blender would subject the

That's essentially what he was talking about at the start, he avoided it largely because of issues with setup. Putting wires into the blender would subject them to being destroyed during the testing process or require putting a hole in the pitcher which also isn't ideal. The strobing idea is actually the way that you'll usually adjust the timing on a car engine, it's a well documented and tested technique, and fairly easy to figure out when you've got a harmonic frequency.