The selecting gears come in pairs of facing teeth with a spring in between each gear in the pair.

The gears have a stop pin between each pair which is held in place by some turns of a retaining spring.

Use a very thin screwdriver (1mm worked for me) to pry out the end of the retaining spring. It should then slide off the pin.

You can now bag the retaining spring, the pin, the pair of gears, and their separating spring. Put the large separating spring in bag 20A.

Each pair of gears is numbered. Write down the sequence! Mine is: 9, 10, 7, 6, 5, 4, 3, 2.

Remove all the gear pairs.