[S] Twin primes past some point are confined to the two flanks of base boundaries — the only twin survivors are the twin-candidate pairs the +1/+2 escape manufactures at each completed primorial base; every other twin dies out.
Direct enumeration, same morning: twin pairs below 2,000,000 = 14,871. Exactly 3 are primorial flanks: (5,7) at 6, (29,31) at 30, (2309,2311) at 2310. Twins per inter-primorial interval grow (10 between 30–210, 55 between 210–2310, 398 between 2310–30030, 4,168 between 30030–510510) — the "desert between bases" the prediction requires is instead the densest territory on the strip. Nearest twin to 30030 is (30011,30013), 17 away; nearest to 510510 is 41 away. Twins do not home in on base boundaries.
[F] Primorial-flank candidate pairs DO occur at every base boundary (forced by the +1 escape) and survive at ~42% against a ~1% candidate-pair baseline — the small-wheel immunity is real and strong, but it is a point guarantee (two addresses per base), not a confinement. Base flanks are twin-rich points, not twin-only territory. The refutation is mechanical (count), not interpretive.
Nothing downstream depends on the confinement; it was a stand-alone
prediction. The surviving weaker version (flank immunity at a point) is
filed in primorial-flank-dead-two-primes. The neighborhood-scale
generalization was separately falsified the same morning
(twin-rich-near-primorials).