Hi Michael,
It turns out that my results can be interpreted purely microscopically after all, without involving any macroscopic extra dimensions. Here is how this may work:
I refer to equations (113) to (116) of the attached paper where the standard scores corresponding to the measurement results A = +/-1 etc. are given by the functions A(n1, L) etc., which are bivectors defined in equation (105). Now the question is whether the co-domain of these functions---which is necessarily S7---can be interpreted purely microscopically, even though the actual measurement events (the results A = +/-1 etc.) are macroscopic events occurring at macroscopic distances apart (cf. Fig. 2 of the second attachment). Well, we can certainly view the bivector A(n1, L) as representing a point of a microscopic S7 attached to a point of a macroscopic S3 by using Planck units for the length of the vector n1. And although the actual measurement events A, B, C, and D are occurring at macroscopic distances, nothing prevents us from evaluating the expectation value (118) as a computation of the correlation among the points of a microscopic S7. In fact in Planck units the distinction between microscopic versus macroscopic is meaningless.
Intuitively this is not too difficult to visualize. Although A, B, C, and D are occurring at macroscopic distances from each other, the bivectors A(n1, L), B(n2, L), C(n3, L), and D(n4, L), viewed as standard scores in the statistical sense, can be moved and brought under the integral (118) for the purposes of computing the correlation among the results A, B, C, and D. In other words, we can view the measurement events A, B, C, D both as occurring macroscopically within S3 as well as microscopically within S7 at the same time. The GHZ correlations are then correlations among the points of this microscopically parallelized S7.
So I now think that it is possible to view your theory as a Locally Unified Theory.
Having said this, I still think the manifold S15 is much more natural from a mathematical point of view, and it would be premature to abandon it. I also remain convinced about my macroscopic experiment for reasons that have more to do with the orientation-entanglement property of the physical space than our present concern. So I am now going to concentrate more on my experiment, leaving you in peace with your theory.
Best,
JoyAttachment #1: 8_1101.1958v1.pdfAttachment #2: 1_GHZ4.pdf