I printed a knockbox from Dominik. Unfortunately, it turned out to be too small for me. I have a 60 portafilter and my coffee would occasionally fall out of the knockbox. At the same time, I wanted a tighter stick in the body as the whole knockbox was quite noisy. It was a good idea to make a perforated bottom to allow the buds to dry. But I didn't want to lose inner space for that though. So I just added the grille itself, which snaps on and holds the inside. Last but not least, I added holes for the rubber pads to keep the knocbox from sliding on the kitchen counter.
Thanks Dominic for the inspiration.
Note: Created from scratch, I was just inspired
The author remixed this model.