Genghis
I don’t want to flog a dead horse, but a few comments re your last
I’m not sure much civvy spinning is done these days – it no longer being a licence requirement.
Even when a type has been well test flown by the pilots and engineers as you mention, I am quite sure that the team will not have covered every combination of entry control rates and deflections, cg conditions, fuel sloshing, throttle position, idle RPM setting and so on and so on. Therefore there is always the chance of a new mode arising.
Various aeroplanes and various people (Roger Topp and others) have convinced me that spinning is not the same as other manoeuvres and so I will always have reservations about the subject. And I submit that is not a bad thing – after all there is no law of aerodynamics that says controls that can be used to make an aeroplane spin will always be able to make it recover from a situation that is very different from the entry!
J