The addition of the EDTA solution to PMK that Gordon recommends eliminates the oxidation problem. Probably not that anyway, as the worst blotching I had was with MaxPyro. I think it has more to do with insufficient prewetting and some vagaries of agitation. The Expert tanks seem to take care of it for me.
Ridge 'blotching' ?
I'm really trying to determine if what I'm talking about is the one and the same issue with the more 'standard' pyro/rotary issues... (which in true odd pyro manner I am yet to experience)
Cleared the bowel problem, working on the consonants...