I'd say it's right to prioritize your scans, but as for Off-Colour, I think your gallery is basically the hub now for art that Taral didn't post before, so I think you may as well cover the CD eventually. I don't know how many physical copies were made in the first place, let alone how many are still out there after 25 years or however long it's been. So, everything you post helps with preservation in that way, too.