This was a total serendipitous discovery. I was watching this YouTube video by Vsauce and incidentally part of his project involved Snell’s Law. I was like, “really, wow!” Maybe, just maybe there is still hope for the Preisner Gravitational Hypothesis.
What the show did tell me was that the egg shaped orbit is still a viable hypothesis. My estimates of the refraction were sort of spot on (almost exact).