I can see you are exasperated, Forester.
Cool off. This is a hobby for some of us.

I'd hoped to tap into your obvious professional expertise.
If I'd found anyone else using your magic technique,
I would have tried to get some help from them, having
already had a similar ration from you before.

The only others I am aware of working the problem
seem either to need or to prefer a separate, and to my mind
LARGE, workspace to do their remastering. Some intrepid
souls even use Windows OS partitions with abandon.

I am primarily interested in how you manage to do otherwise.
I'm impressed at your cleverness and programming clarity.
Only six other downloads of the program I'm complaining
about. Have you heard anything from the others about your
unique take on remastering?

Have you approached KK with your idea? I'm sure he has
the chops to read and execute your code and give you an
opinion. I'd really like to follow such a dialog between
yourself and KK on the advisability and genius which your
scheme exemplifies.

There does exist an intelligent, friendly, civil level of
discourse between 'elephants' and professional level bash
scripting.
You haven't found it yet. I'm here to help you in that regard.