Locke that's great that you came up with your own. Use what works.
I use the scale given to me by my nutritional therapist. I believe it's the one from the IE book.
1. Famished, Irritable
2. Very hungry
4. Slight hunger
6. Appetite goes away
9. Overly full, stuffed
10. Sick, discomfort
I eat when I'm at a 2-3 and eat all the way to an 8.
"No matter how developed you are in any other area of your life, no matter what you say you believe, no matter how sophisticated or enlightened you think you are, how you eat tells all." - Geneen Roth