The Black Hole model has two distinct invisible aspects, Richard. Gravity is one (we all agree on it), and matter capable of collapsing onto itself so nothing can be detected directly by our instruments, that is the other (and we disagree on this).

The Black Eye model has just one invisible aspect: Gravity.

Synergy is the word to understand.

Synergy is a distinct outcome without the use of anything new.

Gravity by all these masses in a galaxy form a synergistic outcome: an enormous gravitational depression.

Any mass coming near the enormous gravitational depression will show us the effects of that depression.

All data we know about the phenomenon can be explained equally toward the invisible mass or toward the synergistic gravitational depression, modifying it some because we are dealing with the inverse of course among both models.

Try to undermine the model, and see that you cannot. Try to look up data that explains the invisible mass beyond the scientific horizon, and you can see that the data can get explained by a synergistic depression just as easily.

Come on, Richard. You can do better. Investigate the model. Be a professional.