I have a newer P line and a 4 year old beat P line in the bag at the moment. The beat P line is the longest disc in the bag. I've dropped all higher speed discs because the extra distance they can get me over the P-PD isn't a lot and it comes with a lot less control. The beat P-PD will finish straight and right for me easily now as well having lost nearly all of its late fade.
That's exactly what I was hoping for. Thanks.