Oops… Sorry guys my bad. For some reason my seed signer’s right button wasn’t working and I don’t have any soldering equipment so I just changes the function of Key3 to right movement. Which ended up me preventing using the custom derivation. And my previous comment was done without actually trying it. Now I changed the Key1 to right and left Key3 as it is and finally after I tried it and after exporting the XPUB I can sign the transactions with the original QR Card you created and without entering derivatives again. Sorry again my bad with the previous comment.