Hi Richard, to be more precise, my experience has been with Criterion rather than Corus. I have applied it to M312, M625, M725, and my current M925 monos over sevral years. While I am incredibly happy about driving my system without preamplifier, I do recognize that some might prefer Corus in the chain.
I might give Corus a try actually, as Rowland will be releasing the external 3-outputs power supply based on ultracapacitors, called PSU. PSU can power up to three compatible devices with DC power 24/7... Currntly, it is compatible with Aeris and Corus... Yes, both connected at the same time. People who have tested said its effect is transformative. Eventually, I hope to verify this on my own system... I would not be surprised if I fell in love with Corus all over again.
G.