I'm not sure I know what you mean by "nite-ize figure 9 aluminum do-dads", Theron, but I'd think that you wouldn't need them if you learned how to tie a prussic knot.
The prussic works as a safety for rappelling. If you use one in your rappel set-up, you won't fall if you let go of the rope for some reason. In other words it's like a "one-way" knot that you can really haul down on.
That's a double fisherman's at the end of the rope that the prussic is being used with.
Edit: sorry, got the names mixed up. The prussic knot allows you to climb the rope should you need to. An autoblock is the safety for rapelling.
In any case, you take my meaning: you can haul down on the prussic.