In the case that you had already generated a positive copy and changed settings (masks, sharpening, crop, dust-removal, etc), would it be possible to have a feature to copy the settings from the old positive copy to the new positive copy, before removing the old positive copy.
(positive copy italicised to differentiate from ‘copy’ as in ‘duplicate’)
I know you can do this manually, but this could be a nice time-saver. It would make it possible to quickly change something about the conversion and have all of your edits in the positive copy stay up to date.