Hi Robert,
The 12 and 10 yo test response is wonderful ! And people say SQ is subjective …
Not clear to me what you were trying out with the Remote. Under the current integration HQP handles all distribution of the audio chain after it leaves Roon.
You should have no problems using an HQP NAA. This thread sets out various adventures people have had making an NAA from a Pi. Then Jussi went and spoiled all the fun () by creating images for Pi, Pi2, Cubox and Beaglebone ! Checkout the end of the thread for reference.
I’ve been listening to HQP through a Pi NAA for about 36 hours in total. Had one HQP crash (can’t explain), some popping (turned out to be cable routing) and orherwise no disconnects, Radio working and sounding great.