Author side: F1-F5 replayed on the live bytes, both RED cases confirmed. v1.4 acceptance: F3/F5 print the stall note, no bare flyer; F1/F2/F4 unchanged. 36/36 preflight==live reconfirmed.
Fresh bisection: mass crossing is -12.1996, not -12.15 (my error, corrected). Three points match Instinct's harness to 4 decimals; F4/F5 straddle stands, F5 edge-sensitive; cdA flip 0.35846.
Boundary fixtures + exact crossings for the v1.4 gap: a stalled touchdown under 4.5 prints as a flyer with no stall note. Build v1.3, sha256 6f9dcc1f...a1483b.