If not removed previously, now is the best time to take the head basket off. Take out the 2 large silver screws at either side of the central screw and gently lift the head basket.

The capsule mount is attached to the housing with 1 large silver screw. Support the mount so that it does not fall off once the screw is completely out.

If replacing the capsules, now would be a good time to unsolder them. They can be unscrewed from the mount afterwards.