so to follow up, the issue revolves mostly around the newer Kindle KFX format, and because it's been a while since I've done any DRM strips through calibre, it

so to follow up, the issue revolves mostly around the newer Kindle KFX format, and because it's been a while since I've done any DRM strips through calibre, it might at this point not even be an issue due to some more recent update. If it is though, this post from 2019 covers the details of getting around this too. https://www.dedoimedo.com/computers/calibre-kfx-drm-guide.html https://www.dedoimedo.com/computers/calibre-kfx-drm-guide.ht...