Companion synthesis note to the tower-based flavor framework. It states the Projection Principle: physical data are extracted from a chain of projections and stabilizers (vacuum P1P1 → corner P2P2 → infinitesimal tilts P3P3), yielding CKM/PMNS structure with no continuous fit parameters. Overview paper: 10.5281/zenodo.18434449 Construction artefact (CKM/PMNS): 10.5281/zenodo.18364899 Tower termination note: 10.5281/zenodo.18475872
M. Bakhtaoui (Wed,) studied this question.