I finally got a chance to finish the opamps and test these out. Unfortunately, only one of them is working at the moment. I must have screwed something up, but I can't figure it out.
The one that isn't working passes signal in bypass, but nothing when engaged. The LED changes from red to green, but no signal. I switched the DOAs, but that doesn't make a difference. I compared the two units, and all the components are identical and in the same polarity. All the opamp power rails have the correct voltage (including DOA), and I can hear the relay activating, so I don't think it's a bad relay. It's hard to troubleshoot much further without a schematic though. Is it possible to get a schematic, or does anyone have any idea of what the issue might be?
As a side note, the one that's working sounds fantastic!