Although the results are inconsistent, I feel like I'm finally getting somewhere with the grays. It's been a challenge, and really, I think I have to just keep doing these. All of these are 4X6". I like this top one, but as you can see from the notation, it's the 3rd state.
This one I don't like so well, and I haven't yet decided whether it needs more cutting, or to just be thrown away.
I like this one too, though it needs a little cleaning up. I took the reference photos myself for 34, 36, and 37, and I'm pleased with that.
Another one that needs more work. I didn't mark it on the proof, but this is also a second state, and I know exactly what I'm going to cut away next.