Position the gear ring above the intermediate barrel as you have removed the gear ring, otherwise the ring will not fit into place.

You may notice that the inside of the gear ring has some nubs, which lines up with indents on the inside of the intermediate barrel.

Lower the gear ring onto the intermediate barrel and then rotate the gear ring clockwise until the zoom brush is back over the ribbon cable.

Again, be very careful with the zoom brush as to not bend its pins.

Screw in the Phillips #00 zoom ribbon cable screw.

Screw in the two JIS #000 gear ring limit screws.