I arrived home from a week in Adelaide to find my replacement AN3 bolts from Vans waiting for me. With a much better understanding of just how little effort is required to "trip" my torque wrench when set at 28 inch-pounds, I managed to successfully bolt up the centre elevator hinge bracket to the HS rear spar without stripping any threads.
Now the HS is finished.
Fixing the centre elevator hinge bracket.
Got my torque wrench worked out this time. No stripped threads!