Didn't quite get that one, Bob... do you, or do you not use it rotary? I found that even at low RPM's, PMK had too much aerial oxidation for
rotary and led to excess fog, or worse, potentially excess edge dev which thicker emulsions. You could print thru it generally, but it certainly
isn't desirable. That's why Hutchings recommended argon gas for rotary, and why tweaks like Rollo-pyro came along. My drum processors are
capable of running a lot slower and more gently than the Jobo, and I'd never go back to using them for PMK.