I have a 1-liter PMK kit setting on my shelf, awaiting trial. But David, there's certainly been a lot of controversy about PMK recently in the forums we both follow. That, and lack of time currently, is why I've been holding back from it.
I thought TXT/ABC was outstanding on low to medium contrast, and that was using the 1:1:1 mixture. But in each case where I had bursts of white, such as clouds or light details amidst gray and black, the highlights have blocked up with loss of detail and texture. But I never had that problem using TX and assorted developers.
I don't know what the technical difference between TX and TXT is, much less why Big K saw fit to make the difference, but I wish the TX emulsion was available in LF.