thanks. do those older models have the same functionality that allows sync with a CW library?

any particular models you’d recommend? looking on ebay to maybe pick up a cheaper one to try this out, but loads of them seem to be very old. i know nothing whatsoever about kobos so a bit lost.

Yes calibre-web (separate thing from calibre itself… confusing name) is just like plex for books. It even has a dark mode that looks exactly like plex

calibre-web plays really nice with my kindle paperwhite.

just click the send to e-reader button on any book and it appears on the kindle, ready to go