720/723/727/743 -> test/asm/callarg_test.ww. Ordered PUSHQ windows, tag-synth + stack-overflow-cleanup needles and the variadic eightbyte store-count floors preserved. Strengthened: 720's 4-variant row gains the byte-id leg the C skipped behind the then-open #22 zero-init gate — #22 landed (724 pins the fix), and the leg verifies green on both stages.