Pitt Pen Variation on the Prairie Fire Theme

I've recently been greatly inspired by artist Pam Carriker. I discovered her blog earlier this month. When she wrote about her new Pitt Pens and posted a video demonstration I was curious. I remembered I'd purchased a similar set several months ago thinking they would be useful for value studies, but I had never gone very far with them. More often my art is very spontaneous. That's not a big deal when working on paper that can be cropped to improve a composition. But as I work on stretched canvases, I don't have that "luxury". It's frustrating to realize that once again I've put the focal area of a painting right in the bulls-eye zone of the canvas. Not cool. So - I'm trying to plan better.
Pam's post was timely because the technique is very quiet and relaxing for me. It was mental therapy for me while I rested my body during my recent illness. I will continue to do this sort of thing in the coming days as my stamina and health improve.
I've been using the Pitt brush markers on Strathmore Bristol smooth that I cut into ATC's. After lightly sketching outline strokes with graphite, I follow through with the Pitt brush pens starting with the lightest shade and progressing to black. I added accents with white charcoal pencil and black gel pen.
Be sure to check out Pam's blog to see her amazing work!
Do you have any forgotten treasures in your art supplies?