Met with the Doc and showed him my charts and graphs. (In fact, I even printed out a copy of this thread and had him read through it.)
We're agreed on the initial strategy. First I need to eat a calibrated amount of carb after a fast and monitor closely to determine exactly how much my blood sugar rises per gram of carb. Then I need to do it again, this time with a bolus of 1/2 unit, and monitor to see how much, and how fast, it comes down.
That will give me the two yardsticks I need to begin calculating appropriate boluses for meals. I will begin with less than the calculated dose (probably half), and creep up slowly until the balance point is reached.
I will monitor it closely for the first little while, then continue checking it in detail occasionally -- every week or two, to make adjustments as needed.
Doc also agrees that I may not need to do this for every meal, or forever. Time will tell.