Progress has been made. FedEx delivers a pair D5k that were purchased from an eBay seller a forum member has offers to sale me a pair of slate cables. This will complete my cable needs. Now I need to secure the fifth D5K to frill the center spot.

M2.0>ROON: C15/DSP6K
C2.2>ROON: ALLO DIGIONE/DSP5K+D2500x2
W2.2>ROON: C10/DSP33+D2500
R2.0>ROON R: MiniDSP SHD>SCHIIT Freya+(Forkbeard)>3eAudio A7 Mono>>>Apogee Scintilla

Projects. ROON streamer with serial RS232 volume control