Welcome Roger
Thank you for your post, and the video explanations.
As was mentioned on the comments after your presentation, the non precission is the problem, either hot and hi, or cold and lo.
Is the relationship to high pressure systems as found in Siberia, for example also similar to the temperature model.
In Siberia, the SLP can be 1045 perhaps, the temp -40c, easily. Do these balance out as ISA is no longer valid.
glf