I leave you with this thought, James:
From my point of view, the inertia which any unaccelerated matter possesses turns into speed and direction relative to any other unaccelerated matter in relative motion with it. The radiation from said unaccelerated matter possesses the same speed and direction relative any detector in relative motion with the radiating matter. Contrary to the Eisensteinian Theory, the radiation is centered upon the source.
Likewise, gravity is centered upon the mass of matter possessing it. The gravity field travels with the mass while it diminishes with the square of the distance from the matter. This makes the "speed of gravity" superfluous, because the field gradient is already existing around said matter. The change in strength of the acceleration acts "instantaneously" upon a change in relative distance of another mass.
Length contraction and time dilation cannot be real effects, since observers in opposite reference frames find the same effects occurring in the other, while experiencing none in their own reference frame. His "measuring the moving train" gedanken is faulty, as I have demonstrated by beginning the measurement from the back of the caboose rather than the front of the locomotive.
Einstein's method of synchronizing clocks is faulty for clocks in relative motion, since the latency he adds to the time is an average of two distances, yielding the "constant speed of light" that he finds regardless of the velocity between clocks which are in relative motion. Furthermore the "correction to the time" is wrong since the distance between clocks has changed during the determination of latency and the sending of the corrected time signal.
"Relativity of simultaneity" concerning the order of events occurs in the "at rest with the source" reference frame among extended event locations and extended observer locations. This is the result of the finite speed of light, and different distances between events and observers. Motion is only secondary and has only to do with changing distances.
