Have to agree with Jim here...there's a lot of audio modules present, but your modulation sources and modules to manipulate them with are pretty lacking here. F'rinstance, the DUSG is quite cool and all...but let's say you need to send an inverted output AND a normal one to two different destinations. Can't do that without attenuverters or polarizers, and I don't see any here. That's just one example; there's plenty of others.