Okay so: update for everyone: this is what worked for me
using a bin from (cough) would always fail when trying to add it to the powertag, but using my link amiibo, I asked it to make multiple backups. Each one of those backups left me with a filename that it would consider valid, so I just renamed the other bins to one of the names from the backups. The only hard part is making a bunch of backups and then deleting them afterwards. or not.
Didnt have to use any of the special programs here, those are just for getting lots of bins at once. I'm happy to get just a few, since you have to manually swap each one out