Seems like I can toggle the payment source freely. Example: mortgage paid via BTC-ACH in December, but in Jan I flip to dollars. Same routing/account for mortgage auto withdrawal. Do I have this ease of funding source flip right nostr:npub1cn4t4cd78nm900qc2hhqte5aa8c9njm6qkfzw95tszufwcwtcnsq7g3vle ?