It’s funny that I would begin with a quick sketch in the morning before heading off to work as an idea, progress through a dozen or more refinements, a couple of directions, think I’d finally landed at a solution, only to return to the first sketch and realize I’d already nailed it.
Above are the first refinements in Illustrator of the last sketch (left) and the first sketch (right). There may be a little tweaking left, some adjustments of line weight or what-not, but they are close to finished illustrations. For a bit of reference, here are the original sketches with the first and last sketches highlighted:
And then, after a bit more work and refinement, the final illustration: