Good for you Dave, meetings with remarkable men enriches your lifetime.

Part of Fritz's method was to abandon all prejudice and take a fresh look which may at times produce what you call bonkers.

In addition to your brief remarks regarding Zwicky's prediction he nearly had the exact amount of dark low interactive matter to make galaxies rotate cohesively as they do.

When analyzing dark matter it is necessary to ask where did it come from and how would this matter be mathematically expressed.
I have proposed both questions are answered by a proses that had no choice to happen and a astrophysicist who has devised a means to describe the subatomic particles in dark matter as fractions. He would poetical describe normal matter as the visible leaves of a tree while dark matter particles comprise the branches.

As you know the majority of mass in the universe is dark matter. Where it came from is the annihilation of anti matter and matter.
The product of this process is at first vast amount of energy some of which will stay as energy but a large amount of that energy will distill down to mass of a form that will not interact anymore with matter. You know the relationship between E and M which virtually makes it essential that dark matter developed by the process I suggest.

I see this as a conceptual break through that can be built upon.
It is very simple but radical idea in its simplicity.

What do you think Dave.