r0r0

Done ;)

I'm so glad you have discovered it! I was a bit worried that no reader of my website would recognize this little gimmick :)

Thanks! Getting the period right was quick, because the pendulum's length was easily adjustable.

Yes, it was meant as a joke.

You are correct. With "length of the pendulum" I meant the distance between fulcrum and center of gravity. Maybe I haven't written that clear enough in my text.