RoonBridge on LMS device - I don't really want to replace my LMS install

You can already stream to SB’s using Roon, it just means you need to stop LMS running at the same time. I’m not sure what architecture the SB Touch is, it can be ssh’d into and I believe you can gain root access…so if it’s armv7hf you may be able to…but I think you’re now flogging a dead horse.