The PCBGM Electric Lover I mentioned in the headache thread. I added the FX loop (using switched jacks) but there was a noise issue when run in the Quad Cortex FX loop - Guitar -> Pedal -> QC worked fine.
It turns out it was the same mysterious noise issue I had run before that
@JTEX managed to solve. I had created the cable with a cap soldered from tip to ground I think, and I had marked which end goes to the pedal with masking tape.
The masking tape had slid to the other end so the cable was the wrong way around now. Fixed that and the noise issue disappeared.
I'm not sure if they're going to sell it going into the future, but about the FX loop. There have been some posts about how it's affecting the biasing, but I
suspect that's misunderstood - it's repeated that "bridging the FX loop
and switching a bias resistor allow it to be biased correctly", where obviously the FX loop doesn't affect the bias itself. But since bias is often done by ear by listening to the flanging,
and all the dry signal goes through the "FX loop", if you leave it open you won't get the dry sound -> no flanging -> hard to bias. Using switched jacks fixes that, so you can use the FX loop if you wish or leave the cable out to return the normal dry signal path. Or plug a cable in just one end to make it into a vibrato pedal.