The Unified Field Theory provides a method for precisely calculating Hubble’s constant, but it comes with a price, for an extra complication is introduced in that we must consider the difference in time dilation between the emitting source and the receiver, for a receiver can see an emitting source as being red shifted for a cause other than the Doppler Effect.
If our instruments are capable of such resolution, would it not be possible to measure the ‘gravitational depth’ of a galaxy, for the difference between the edge and the center of the galaxy would be a measure of the time dilation and thus a measure of the gravitational depth. This measure would be ‘relative’, and thus independent of the Doppler Effect or any blue-shifting effect, since it is simply the calculation of the apparent difference between the edge and the deep center of some galaxy. If we know this value and if we know the value of our own ‘depth’ then it would seem to me that it would be possible to do any required mathematical transformations to eliminate any potential errors when using the red-shift as a tool to calculate distance.