Halloween and a four-day weekend for the kids delayed my progress on this, but I'll get there. I'm not thrilled with my judgement on the values in this second exercise--too light on the ground plane. On my very first experience with this exercise I'd gone too dark on the ground plane, so I think was reacting to that.
Again, I used a limited palette in hopes of challenging my brain to think in values and not necessarily in local color. Here I used a mixture of cad red and a green (which I mixed from cad yellow and ultramarine blue).