I haven't bookmarked something in ages. I bookmarked this. The value added with a single new operator is amazing. Feel good about this work. Not many people can create something so unique and valuable by adding so little.
Thank you! I've been thinking about this problem for years, and had several ideas in that time. But the complexity always grew out of proportion as I started adding "features" to the notation and the tool. In the end, I'm happy with how it looks like now, even if it isn't perfect by any means.