Joerg puts his equipment through a lot of abuse to film videos for the slingshot channel. And the catchbox he shoots into has borne the brunt of all that mayhem for three years. But it's probably been so gradual that no one really noticed. And then in a moment of clarity Joerg clearly realized that his catch box had evolved into a piece of useless nothing. Time for the junkyard.
Joerg made a new catchbox out of wood, which he covered in butyl rubber aka old tires. The goal is a balance between energy absorption and inelasticity. And the box is slanted so the bullets roll to the side and collect in a box below. Also, Joerg's wife gave him a stuffed animal (a christmas beaver/woodchuck?) as the mascot for the catchbox, which is thoroughly random, but classic Slingshot Channel.