Figure out how to upload white balance settings to a custom mode

One of the major pain points of uploading recipes at the moment is that recipes don’t change white balance since colour balance is custom mode wide, not per profile.

When uploading .set files to the camera via OI.share, I believe white balance can be set to a custom mode, so I wonder if there might be way to at least set white balance for the custom mode if several profiles share a white balance bias.