I have vMSR talking to my GC-100 RS232 port 1:1 connected to my 861 in a cabinet out of sight of the MSR+. My HC is set as master. All works great with either MSR.

John

1: 808.6 Anniversary, 504, Sony ES Bluray player, Apple TV, Trinnov Altitude 32, 7200SEU l/r/c, plus for immersive audio
2: Theta Compli Blu, Apple TV, HD621, G61RSL, B&W Sig 8NT l/r/c, & Runco Plasma
3: 861v8, 504, Apple TV for streaming 3100 l/r/c
roon all around