I want to qualify this by saying that I'm of course no expert- but it took me a while to start to show improvement as well and my diagnostic was right around yours. For me, I had to figure out what the underlying issues actually were to get out of t…
I am still working on this, but have moved from mid-160s to consistently high 160s/low 170s for my last few PTs. For me, it's really embracing the idea that there aren't "close" answers. If I'm not seeing the clear answer, then I'm missing something…