I love lightning, but it’s very frustrating at the same time. It’s simply cheaper to use custodians.. and I believe that it isn’t necessary. The crucial part of sovereignty is ability to sign the message. Which doesn’t require any costs. Therefore I believe that there is some way how to make self-custody fast and cheap. And here is my current way of thinking. This approach is kind of naive but maybe there is some potential. Maybe it motivates you to improve it into something even better.