IV.R120 — One constant one anchor zero parameters

Every fundamental particle mass in the table is determined by one dimensionless constant iota_tau = 2/(pi+e), one dimensional anchor m_n = 939.565421 MeV, and zero free dimensionless parameters; the Standard Model's ~25 free parameters (Yukawas, gauge couplings, CKM/PMNS, Higgs VEV, QCD angle) reduce to this single input.