The "Davis Model" (and all others that appeal to General Relativity) are broken because they didn't actually read what Einstein wrote. Gravity and Acceleration are only equivalent for a UNIFORM gravitational field and UNIFORM acceleration.
Gravitational pull and acceleration are equivalent, both are an inertial force. Uniformly across a mass is beside the point.
No - ONLY if the gravitational field is uniform - which it isn't. Gravitational fields vary according to square of the distance from the source. Einstein's statement is a part of a thought experiment.
No "real world" gravitational field is uniform because it lessens in proportion to the square of the distance between bodies. This is why we have tides. In RET, the earth experiences a non-uniform gravitational field from the moon because the near-side and far-sides of the planet are appreciably different distances from it. In FET, no such effect could happen.
Looks like you aren't dealing with the model but are rather trying to assert FE could never explain this.
The Davis model asserts that gravitation and acceleration are equivalent...and then goes on to say that there is universal acceleration and that we couldn't tell the difference between that and "true" gravity because Einstein says they are equivalent. But that's not what Einstein said - so this is a FALSE justification.
In practice, you can tell the difference between gravity and acceleration - which is why (for example) gravity is less on mountain peaks...something which universal acceleration can't explain because a "fake gravity" created by acceleration would produce what would appear to be a uniform gravitational field...and it clearly ain't uniform because of the mountain thing.
So the reality of variable gravimetric readings is proof that acceleration cannot explain these phenomena.
So the "Davis Model" is a pile of poop - just like all the others.
You didn't even make an objection to the model.
Sorry - I assumed you could deduce that from the fact that the justification for it is bullshit (on account of not actually reading what Einstein said).