Alright, thanks for that.
So there's no reason you can't assign the original drive letter to the encrypted drive after removing it from the original drive? Wow, that warning's wording is needlessly confusing.
Upon successfully encrypting a non-system drive, VeraCrypt produces the following warning message: IMPORTANT: Please keep in mind that this volume can NOT be mounted / accessed using the drive letter [x:], which is currently assigned to it! To mount this volume, click 'Auto-Mount Devices' in the main VeraCrypt window (alternatively, in the main VeraCrypt window, click 'Select Device', then select this partition/device, and click 'Mount'). The volume will be mounted to a different drive letter, which...