Step 8: Scrub-a-dub Dub
Snap the impeller and the water level sensor back in place, then close your freshly cleaned poopinart (sorry - impeller assembly), snapping it shut securely.
Check the hole the poopinart goes into for granules - a few is okay, but too many in the bottom and it won't seat properly. Lots of granules? Add water and dump them into the toilet.
Reinstall the ever-important red washer, and slide the whole assembly back into the lower housing. Spin the impeller with the drill again to empty out your wash water, rinse and repeat.
Place the bowl back on the center spindle; it should spin freely. Put the upper housing back in place. Now, you're probably thinking you should put the hand back on the arm, but that's a baaaaaad idea. Since all the granules are wet, when you run a cycle (to clean those nasty pellets) they'll stick together in a mass and you'll lose a couple of handfuls down the impeller. Granules are expensive. Losing them is bad.