The anti-shake unit is held on by 3 screws and flex tape.

Of course besides looking for the positions of the shim washers, be careful removing this piece because the sensor is attached to it and will be exposed. Furthermore, the sensor mount is flexible and fragile.

You can see the repaired mounts on my sensor block. The bottom screw had come out and the top mounts broke as a result. The loose bottom screw was also jamming in my shutter unit and made me think the shutter unit was broken.