I did that for both the L/R channels. I measured at the end of the RCA cables where they would be plugging into my Kaiju. They both read the same voltage of 0.98VAC. I also added the Kaiju into the mix, but this time with some attenuation. With the output of the BeePres reading the same voltage, the output of both Kaiju outputs were the same. I even rotated the Kaiju knobs to make sure I was starting from the same point, and they ended up roughly at the same location on the dial.
Is it possible that I had a bad solder join in the BeePre balance dial that was adding in more resistance and attenuation on the right channel? I think that is the best explanation I can come up with at this point.
Everything seems to be working super fine, and the sound is amazing.