I am familiar with the technique from (we call it Bassai Dai). I can visualize the pressure points for this application. I don't choke people out for practice. We would "practice" this technique with no more than touch pressure to assure quick and accurate PP location and building some proprioception to that it could be accessed under pressure. It is one of those things where you wonder if you could make it work "for real" if you HAD to. It solved your self defense problem and did less damage than a follow up strike might have done. Well done. That is why we study this stuff.
The older I get, the better I was!