I have progressed with my stretch sketch. I transferred the sketch onto hotpress watercolor paper, shifting a few things around. (Sorry it's lightly drawn and therefore difficult to see.)
I then painted it with watercolors, using both pan watercolors and watercolor crayons. Some of this involved painting wet over dry as well as creating a wash for the background.
Tomorrow, pen work.
Even though I've previously stated that I would not usually paint this kind of picture, I have enjoyed it. Firstly, I feel challenged. Secondly, I realize I can sketch and paint anything and have fun doing it. I plan to do this again in the near future!