I read your post way back in the 900s suggesting something similar - IIRC you suggested the HS deflected leading edge upward into the airflow. To me, the evidence suggests a deflection downward (though possibly both occurred).
I have no idea how plausible this scenario is, but this was my thinking:
https://twitter.com/shadwell_NTT/sta...72599498604544
Basically:
HS deflects down - effectively converting it to an airbrake.
Internal front edge of HS takes out all connections to both flight recorders as it rotates downward.
Front apex of HS hits supporting frame below.
Aerodrag pulls HS straight out the back, taking the lower supporting frame with it, knocking off the APU cone as it goes & ripping out the fuel line.
Escaping fuel from broken fuel line ignited by severed electrical connections to tail.