I use the spc v2 in conjunction with Audiophonics' i-sabre amp-dac hat on a Ri 4. Once I found the Audiophonics github page after digging through the forums, getting the scripts up and running on a vanilla Raspbian build was a breeze (a direct link to these scripts on the product page in addition to the Volumio/Moode tutorials wouldn't hurt) .
Perhaps its a failure of my own wiring, but I've noticed that after adding the module, my Pi no longer provides enough current to power an external hard drive on the USB 3 ports. This was not a problem before, when powering the Pi through the i-sabre amp-dac alone without the PI-SPC.