As I was inking my two ambiguous and two stable, it was scary tracing the organic and geometrical shapes since ink is not something you an erase. I do not have a steady hand but tracing with ink pen .02 made it easier for me. It was also hard for me to ink in the shapes with the brush because it was too big for some corners and edges, I was afraid to ink outside the lines. This whole process took me about 3 and a half hours.
I love your stable drawings, and yes i agree ink can be scary but great job. And i like how you decided to do an inverse for the ambiguous. Maybe just try to outline your borders darker