Custom storage layout configuration examples

Hey folks. This is a great feature - working on kicking the tires on it now.

Question - I see that Custom is now (in the 3.3 beta) an option for the default storage type in the UI’s Settings page. Can you explain how that setting interacts with custom commissioning scripts?

For example, if I have something else set for storage default layout (let’s say, Flat), and I have a custom storage commissioning script, do I need to pick Custom as my default storage layout for that to trigger? If not, what is the use of picking the Custom storage default layout?

Also - maybe this is part of the updated docs push for 3.3, but is there a list of supported file system types?

Thanks!