Ok so I've been going through a Metallica kick lately and it's got me reading Flemming's studio notes again, the one thing that has me puzzled is his "quad level" box that converts the signal in the loop from the amp to the PEQ, then back from the PEQ to the amp. According to Mesa the loop is -10db in/out while the Aphex EQF500 (and original EQF2) is +4db in/out. I'm reading a bit about people with Mark III's and earlier who have problems with the loop either clipping or greatly dropping in volume due to this mismatch in level. Excuse my ignorance but is there a product out there that does what this "quad level" box does? I own a mxr 10 band EQ which according to the manual is +14db in/out with all sliders set to zero, and I have no issues at all with this, a/b/c with the pedal on/off/ and out of the loop there's no volume jump or clipping. Would a buffer like the Ceriatone Klein-ulator achieve this? I've been trying to research this but unfortunately I can't find anything. Any help is greatly appreciated. 