[Corsair]

You need lot more than 2 plots, just because of the range possible error (some plots will be canceled as not coherent with the rest). I do my plotting from a safe distance until I get a reasonably confident course and speed. Then I figure out an intercept course to a position ahead of target, preferably at 90° AOB if possible (not always) and max 1000m from where it will be for shooting.
I enter all data directly in the slide out TDC dials I have in scope / UZO view as I find it easier than using the notepad and I can visualize the data.

PS : another way of estimating the course of target is for me to use the bearing and AOB to calculate it...