I have an equipment rack into which I wish to build the Pimeta V2.  What I want to do is have the volume knob be the sole means of support for the circuit board; it would otherwise "hover" in the air.  The volume knob will be mounted through a metal rack panel.   Assume that I will properly...

  Can anyone direct me to some good information on how to create balanced inputs for the likes of a PIMETA?  I've seen that Tangent recommends a Texas Instruments INA121 chip.  But as I am very new to this (I have only so far built one cmoy), I still need much hand-holding (or learning, as it...