(FFF= Function Follows Form: e.g. for the propeller shaped fermion string concept)
However, Fermions are repelled at the horizon and transformed into two jets, perpendicular to the plasma disc, the origin of Fermi Bubbles into the direction of so coined GABHs (Galaxy Anchor Black Holes.)
Below: MeerKat precursor release of the Milky Way center, showing dual Herbig Haro systems (in circles) which after smaller dual black hole consumption leave dead plasma jets and baby stars behind.
see: Preference for Dual Herbig Haro Black Hole Consumption by the Central MW Black Hole, Leaving Plasma Jets Behind.
LIGO could perhaps measure such double gravity collapse signals inside the Milky Way center.