I came across this link, which I feel diagrams PRCO, but from a filmmaking analysis method. It also shows the type of dynamics each of the four SP would have, in light of the analysis.
Related to this, the following also reflects the tensions of bump slide bump.
Even with my slide bump slide, my midpoint is crossing over into darkness, into the pessimism.
Both, I think, are a way to transition between storyforming and writing scenes.