I ran the same KFK eq that KH Guitar Freak used... but I used it on front of my 2 channel DR. It can really alter your tone in anyway you want it to, but I have since taken it off of my pedalboard... only because the sound of my older recto is beast enough by itself.
That being said, if you are in 3 channel recto realm, an eq can help tame those "fizzy" frequencies.