Well, great to have someone with similar setup. Have you tried Logitech media server on your rendu? Also, what is rest of your setup,... speakers and speaker cables? I have Pmc 23 in small room but still searching for cables. How about better PS for rendu and do you need some hardware extra for rendu to work in HQ PLayer NNA mode? Lots of questions I know, but lots of missing parts in my setup!
I have only used Roon Ready and HQPLayer NAA modes with Microrendu. You will need to have the HQPLAYER software running on your computer if you use the hqplayer NAA with Microrendu. And you can still control everything from the ROON Server. Why I use hqplayer is that it allows mw to upsample any pcm music file to DSD if you so wishes on the fly before send to microrendu/dac . So you can experiment and decide if you like the sound.
My main system (Music):
WD My Cloud NAS'es
Roon Server on Windows 10 PC
Nuprime DAC 10H
Pair of Nuprime MCH K38 providing 8 channels in bridge mode
VMPS RM40 Speakers (R+L)
Cables: Audioquest SKY XLRs for interconnects, Wywires USB Cable, Audioquest Volcano Speaker Cables, Wywires Power cables