As part of my attempt at designing a rackmount control surface for my MB-6582, I was thinking of having a phono jack up front and in the back for the mixed output. That way, if I want to just listen in quickly, I can just connect some headphones and what not. I was also thinking of using a volume knob up front. I know Wilba says the output from the mixed out is attenuated but it's actually pretty loud to me when using headphones. So I was thinking of having a volume knob up front. I assume I jus