Have you tried simply making another FFT?
there seems to be some confusion about whether or not it shows you the post-filtered data…
here’s a thread where a few people say it doesn’t show you the post-filtered data… But then at the very end someone posts screen shots where there is a clear improvement in their notch enabled vs disabled FFT’s.
I am using the notch and was able to increase my PID’s w/ it enabled. But I have not yet made a new FFT so don’t personally know if it shows you the filtered data or not.