S359 COMPLETE. zeta(2) = pi^2/D_BSFG = 1.644934 (= pi^2/6, exact); zeta(4) = pi^4 * D_BSFG/(N_ch*A_5) = pi^4/90 = 1.082323 (= pi^4/90, exact); both identities are locked-primitive renderings of standard zeta identities.
