I flew a T67A. A different aircraft in many ways to the T67M’s but the same horizontal/vertical tail configuration and additional rear CofG traps for the unwary. It seemed to me that if the aircraft flicked into an incipient spin, the natural reaction was to unload, ie, stick forward. It was then counter intuitive to first move the stick back, apply full then stick forward again. I also suspect that some accidents arose from slow centring of the controls and going into an inverted spin.