I got mine built up, but I'm having a strange issue.
When I check for unity gain with the threshold set to +15, ratio at 2:1, and a -22dBFS signal, the output is about 4dB down. The meter confirms this, showing 3-4dB of gain reduction. If I lower the input signal to around -40dBFS, I can get the input and output to match and not show any gain reduction on the meter. It's almost as if the threshold is set far too low (even with the knob at +15). I get the same behavior when the ratio is set to 1.5:1, 2:1, and 4:1, but as soon as I switch to 6:1 or higher, everything seems to behave properly. I'm guessing I have a resistor out of place somewhere around the ratio switch?