I would ask for Sloss to write an SLS book at some point, but it would turn into a 3000 page manuscript with more detail than I know what to do with.

Access to some internal interfaces for testing has to be covered with foam for flight,

This has to be one of the bigger conceptual differences vs a vehicle like the Falcon 9, and it’s another place where Hydrogen seems like a pain in the butt that I hadn’t thought about. Foaming over test interfaces is the type of thing that shouldn’t matter, but always inevitably does.