A few were ready. You can see that the color transitions are pretty sharp. I've learned how to control that.
For a while, I've been thinking about writing a book on how to make your own dirty threads, but it seemed like a lot of trouble for four or five pages.
With that in mind this time, I made (mental) notes of all the yes/no, how much/how long, etc. decisions and the outcomes or why of each choice along the way. Expressing things that have become intuitive is important when one is attempting to teach. And sometimes I did not have any answers for the questions I posed.