Hi guys. I recently got SPDIF reamping working with Cubase Pro 8.5 and my Steinberg MR816 CSX interface. It's awesome but there were a few non-intuitive things i encountered on the way that really weren't very obvious to solve. If you happen to have this studio set up and are looking for assistance I've written up a quick guide on the Steinberg MR816 forum here:
https://www.steinberg.net/forums/viewtopic.php?f=31&t=135404
Maybe it'll be handy for someone! 