RE: Flat Spins in a BVM Bandit
Opposite aileron (lt in this case) typically enhances the spin rather than breaking it, as it (counter-intuitively) makes the outboard wing develop more lift while stalling the inboard wing more deeply. Then going "in-spin" (rt) would add drag to outboard wing, stall it, and slow the rotation, even as it "washes out" the rt wing and helps break the stall on that side. (If this seems confusing then remember that spins and snaps are conditions where one wing is stalled and the other is not) Ur spot on ref the vert stab being more effective while inverted.
Dn elev is ideally applied after the rotation stops so that you don't create an accelerated spin, but hey....
If your jet is in one piece then theory aside, whatever you did worked for whatever reason, and it's a good day !
Big props to you for doing more than the usual "whoosh, pull, repeat" typically seen with jets, thanks for sharing the great pics!
Don.