Masterwork Ring/Amulet

[freeAgent]

As far as I know you can wear as many rings as you want to. If you want 10 rings on each finger go for it, you only get the magic from 2 rings though. As long as it isn't considered a magic ring it doesn't take up a "ring slot".

Yes. These are non-magic items, so you can wear as many as you want and they don't take up a "slot" because they don't have an impact on the characters' abilities. This has always been the case.

Another idea would be to use a tattoo or brand.