Hi Ray
I acknowledge my limitations even incompetence in many areas of physics, particullarly the algebraic side of their mathematical descriptions. Yet the fundamentals are accesible by using geometrical mechanistic thinking even common sense. That is my claim - I intuitively see the possibility of interactions being reduced to simple local linear exchanges in a cellular automata. We can regard such a world as a model, something outside ourselves and outside observers. Relativity, for example Lorentz length contraction (not space contraction as in SR) exists in such a model not because of moving frames with constant c, but because signals undergo doppler delays as they travel back and forth in the lattice.
Lots of work to be done there to prove my points but I have a hunch - and a hope - it works out.
Best wishes, Vladimir