I don't understand the reference to red and blue circles.
On the lower half, I can see a black gear-arm with a white washer in place. The end of that gear arm is adjacent to the gear on a white gear-arm. Both have washers and seem to be moving freely. FWIW, the sliding mechanism seems to move freely.
But I don't see the brake levers from this viewpoint.
On the lower half, I can see a black gear-arm with a white washer in place. The end of that gear arm is adjacent to the gear on a white gear-arm. Both have washers and seem to be moving freely. FWIW, the sliding mechanism seems to move freely.
But I don't see the brake levers from this viewpoint.