hmm, okay, I still dont understand it than because on that pics, the both valves sit at the end of the thread

And the only difference I see is that the thread is different....so, its confusing
Question, the adjustment tool for the fps in the npas kit (I assume thats an npas you show or is it the stock valve) what role does that play in this modification?
It becomes irrelevant I assume if you close it for max fps?