Not counting back gears, spindle gear, or the three gears on the tumbler, the standard number of Change Gears with a stock as-shipped 618 is 14. That's 9 in the Change Gear Set and 5 on the bracket (AKA banjo or quadrant, as-shipped as shown in the Atlas manual). There are two 32T in the Change Gear Set and two 64T on the quadrant. All of the rest are one of each. There should also be 3 gear spacers, which are about the same OD as a 20T.
Robert D.