I had no idea the extent that Kobos allow you to do these sort of things. Heavily considering a Kobo as my next e-reader once my PW3 gives ups. Is there a good starting resource for Kobo modifications like you mentioned?
1. https://github.com/pgaskin/kobopatch-patches/releases optional but nice to tweak some small ui details and get rid of ads
2. https://github.com/videah/kobo-tailscale to have a secure connection with your calibre-web instance, but you could also use self-signed certs
3. https://github.com/janeczku/calibre-web/wiki/Kobo-Integratio... adding books to calibre-web will cause them to appear on the device the next time it syncs with calibre-web
Out of curiosity, why block updates? Does it conflict with your modification