Which reducer to use

I have a set of negatives that appear to be slightly over-exposed and over-developed. I'm considering treating them with a proprotional reducer. I have some potassium ferricyanide and hypo that I could use, but I noticed that Photographer's Formulary sells a potassium permanganate-ammonium persulfate reducer (Reducer III) that might be better suited to my purposes. My complaint with potassium ferricyanide is that it is difficult to control/predict. Anyone have experience with the potassium permanganate-ammonium persulfate reducer? I'd be interested in hearing if it has any advantages or drawbacks. BTW I have some test negs from the roll -- I understand the risks of reduction.

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