The edges of the opening are effectively the same lengths as the edges of the rotating pieces. If the walls were angled enough to avoid clipping, there would be a visible gap as the rotating bit moves through and its inner face moves away from the inner face of the opening. To avoid clipping and still have continuous contact, the inner surfaces between the openings would need to be rounded all the way to the edge.
Could be angled, it’s hard to tell. I don’t see any visible clipping.
The edges of the opening are effectively the same lengths as the edges of the rotating pieces. If the walls were angled enough to avoid clipping, there would be a visible gap as the rotating bit moves through and its inner face moves away from the inner face of the opening. To avoid clipping and still have continuous contact, the inner surfaces between the openings would need to be rounded all the way to the edge.
Makes sense. Thanks I hate this now 😅