The Book Of Pyro may be 21 years old, but there are still some gems in it.
PMK didn't work for me because I mainly use BTZS tubes. I switched to Rollo pyro, which essentially is PMK, but for rotary. In the end I switched to Pyrocat-HD, because I prefered the look, and of it's ability to give extremely high aqutance in stand/semi-stand devleopment.
Still love Xtol, and D-19. To each his own.