IV.R410 — m_μ NNLO + p-n NLO Precision Status after Sprint 6D

Precision status: m_μ/m_e at +43 ppm (k=23/3, τ-eff) or -8.2 ppm (k=7.5=3W₃(4)/2, τ-eff best). p-n mass: C.3 NLO at +5 ppm (τ-eff, best precision), C.5 at +28 ppm (τ-eff). Both formulas structurally derived. 23=W₃(4)+W₃(3)+1 is first Window-algebra NNLO exponent. 3/20=N_c/(4·W₃(4)) first Window-Universality nucleon EM coefficient.