Lightspeed Variation experiment with a rotating- and a fixed ring shaped mirror to test the 1 cm distance DRAG effect of light.
(only in a small scale lab experiment, which was by Babcock and Bergman already proven, but was not recognized until now.)
This experiment need maximum precision of the magnetic driven bearing of the inner mirror, and the surface flatness of both ring shaped mirrors.
Professor Gerard 't Hooft was not certain how he could manage such precision, which was the end of the experiment.
More Quantum FFF Theory related experiments:
For more Everett QM relation, see also:
https://bigbang-entanglement.blogspot.com/2019/08/the-conscious-multiverse-with.html
Remaining problem:
The solution for the Double slit problem in Q-FFF Theory.
Bohmian interpretation should give the solution, if we take two SuSy instant entangled universal bubbles ( anti matter and material)
Bohmian Double Slit Interpretation by Dual Entangled Universes, and the Benjamin Libet experiment
http://vixra.org/pdf/1704.0047v1.pdf