Silvercrest Vacuum Robot Brush Replacement

Our old Silvercrest vacuum cleaning robot (SSRA1) broke nearly all of its brushes, so I designed replacement parts for it. UPDATE 14.09.2025: I sligtly adjusted the angle of the brushes because the original setup was grinding on the housing, causing a squeaking noise. The problem is visible in one of the pictures. I've tested the new ones for a few weeks and they don't show any grinding marks, and the noise has disappeared. I used the old brushes, which I carefully extracted from the original rubber arms. Since the arms of my replacement part are a bit shorter, the reach of the brushes is slightly reduced. You can also use longer bristles from a broom to extend the reach. As shown, I used zip ties to keep the brushes together, which might help even more when using broom bristles. The holes in the printed replacement part a bit narrow, and it's quite hard to push the brushes in, but I managed to insert them. In an initial test, they seemed to hold even without glue. In the e