If I understand the way the Rebuilder works, it opens each ROM in the Add-Path, inspects each file, and then creates - or adds to - in the output directory every single supported ROM that uses that file. This can result in hundreds of ROMs in the output directory that only have one or two files in them.

I'm not trying to get them all, but have too many to manually check the ones I have in Settings.

Is there a way to have the Rebuilder (or a scan after a rebuild) check all the sets and move or delete all the files that don't have a valid ROM set in them? If not, would it be considered if I requested it as a feature?