Yes, Ican I think that you have just given me a way to translate the total of accelerations acting upon a (poetic) photon to Z. I'm gonna sleep on it for a while. (The arches worked but I don't know how to say it.

)
This (your column of figures) ie "when D=1 then Z=0.0001" will need to be adjusted in order to reflect the accelerations at that distance.
I haven't yet figured out a nice way to show it yet but I like your idea.
It may show up like that sometime.Possibly, Heading hopefully towards probably.

Maybe----