James,
I clarified the non accelerative DFM case here Nov 7;
"No, they don't change. Consider why; I'm at rest in space with one clock. A planet comes past on it's orbital path and only just misses us. An identical clock on it's surface passes by. Which one is 'moving'?"... "all inertial frames are equivalent"
"If the clock is a rigid body it will not contract (but as nothing is perfectly rigid at 3rd order it may!). If it's one of those fancy new jello and gas clocks, then it will contract (when at rest nearer Earth). Take it back up to the space station airlock, and it will expand! But, just like a gas being heated, it's just the density, or space between the particles that changes (Classical mechanics)."
Indeed you didn't offer any refutation of the clear logic, or answered the question; 'which one is moving'? You say "you are wrong", but offer no falsification of my very significant evidence and logic (see also the recent links posted) or offer any verification of your own belief. (In fact James you should of course correctly say "I disagree," or "that is inconsistent with...", or you're not doing science but beliefs!).
When we don't offer any datum we're left thinking anthropocentrically. Speed is only a relative concept. And I agree Einstein's 'solution' was no solution, but that does not make him a fool. You badly misjudge his comment about 'new ways to think', It had nothing to do with his work, in fact quite the reverse. The proper quote is: "We won't solve our problems using the same kind of thinking we used to create them." And I agree. An excellent proof is here; http://www2.psych.ubc.ca/~henrich/pdfs/WeirdPeople.pdf
Rejecting even the idea that a different approach is possible is tantamount to wearing blinkers. I promise you that reading that paper is an eye opener.
Also; Compton. Please explain, if spatially separated and doing the same speed (at rest wrt each other) how can there be an encounter?
Where you entirely agree with the DFM is your last line; "There are background properties and relative velocities within them. Different velocities do give different observed and real results."
But you have not yet chased down all the implications of that statement. There can be no one single ('absolute') background frame. i.e. The planet you are using as a datum is NOT the only datum in the universe, it is itself moving wrt a background. And that background is moving wrt a background. Precisely as the 'nested' structure of Truth Propositional Logic. It is that ontology that the 'new' holistic way of thinking helps to rationalise.
Your last message; I suggest the 'idea' or word 'spacetime' can't be wrong, but what is wrong is the assumption that something that cannot exist in the theory itself (the 'ether' frame) can then be 'curved'! The evidence is in the 'chasm' between SR and QM, which is why I have shown the quantized underlying process can produce the effects we call curved 'spacetime'. You may think that a bit semantic, and may be right, but that would be to miss this main point.
Finally; You again agree with the DFM to the extent that matter is motion, but for some reason not explained refer to 'changes' of velocity (acceleration). If spin (rotational or otherwise) is acceleration then I agree. Otherwise not. But particle physics does have an answer to your question (quite universally accepted I gather); It was explained to me very recently by a Fermilab physicist in these word;
"E = mc^2 is only correct for an object at rest (meaning in the center of momentum frame). A proton at rest counts, even though the constituents move. For a stationary proton, the center of momentum is unmoving."
This is in fact fully consistent with the DFM, where each particle is an 'inertial system', but the DFM also goes on the recognise that a local background 'n body system' or even 'ether' frame is still also required to complete the logical construction.
I hope that helps.
peter