Appending 'disc 1' etc to the folder after ripping did the trick and the restore process was straight forward as i had created a fresh share on my NAS for the Sooloos rips and just pointed Control:PC recovery at that share. I guess same woukd be true if I had used a seperate folder structure.

One slight issue is that when dBpoweramp did metadata lookup, on the metadata comparison page, album artist was set to artist of first track and album artist on main screen was blank even though the meta data had it down as a compilation album. I manually entered 'Various Artists' into these but not sure if this was necessary.

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).