I heard about the Ledger Card and I made the choice of not pursuing it.
--> Ledger is a wallet and the card can be a potential gateway that weakens the structures.
--> Ledger is a wallet to teach people how to make their own caveau. Using it will create two risks: wrong money management of reserves, making many people know that that guy has a Ledger. So you caveau will not be secret any more.
I hope this makes sense to you