I had to prioritize life for a couple of days, (ginger wine making took almost all day Wednesday,) then I lost my mojo, so I didn't get back to it for the rest of the week. But I see one way forward; I'm going to do the shade cards again when the weather is stable, and group together cones with similar values. I figured I don't need to know absolute values, but only relative, for this purpose. Then I'll observe these groups and hopefully see my next step.
But not today, it's weeding day here.