Install the "F" shaped pull back lever upside down, so the leg of the "F" protrudes up into the disk. One end of the return spring hooks into the middle horizontal bar of the "F" (there is a "V" shaped cutout), the other end hooks into the groove cast into the back edge of the powder measure base.
F shaped pull back lever # AD2309 = http://leeprecision.com/powder-mea-levr-f.html
Spring # AD2296 = http://leeprecision.com/spring.html
