You have arrived at the end, last test.
Set the metronome to 40bpm
Get the tabasco / spicy sauce
Take the pestle and the short cylinder.
Exactly as before, sit down, place the balls on the hard surface, now masturbate until you are hard, then cover the head of tabasco sauce / hot sauce, put as much as you can, wait a few seconds to start burning.
As soon as it starts to burn, turn on the metronome and place the cylinder over the balls, in rhythm with the metronome, use the pusher to crush those balls, press, hold and rotate, continue until the head of the cock stops burning, completes this and you will convince me that you have steel balls.