So the cobra equation has made me re-evaluate many things about the Effective demand research.
The main cause was that the graph of the Cobra equation was showing that capital utilization would increase from this point on. I was assuming that as employment increased, that the utilization of capital would also increase. That is a mistake. The graph shows that capital will be less utilized as labor is more utilized at this point.
So here is the revised graph...
I was projecting a lower limit of 7% for unemployment, but that was based on capital utilization rising. Now I have to reconfigure how low unemployment might go.