As I said, usually you do not have to re-copy your music, your music is not touched when you reinstall rock box.
Yeah, understood. Unfortunately I was unable to recover the previous build - once it was stuck in the "1/9 Committed" loop nothing would bring it out. Once I was able to find a way to force my PC to see it again, I'd done something to reset it to only show 128gb so I think I forced it into an apple recovery point. Meaning I had to start all over again. So I'm half way through the process of loading everything up and then I'll use the utility tool to load the latest release.
Following that, I'll follow all your helpful points on settings too - thank you for those