What is different to the first video? The missing clutter after the second CLACK! I used my own coco nut, which is bigger than the delivered one. And the rising curve on the cam shaft after the second cam isn’t steep enough to divide the halves quickly enough.
The rubber strap around the coco nut is for higher velocities – the halves can’t get together on higher speed without it. Velocity on video at km/h.