If you are like me and usually save your songs as projects a frustrating thing can be later trying to build a live set with various songs in one project to allow for a seamless live set with the s2400 as the brain.
Suggesting a feature that allows you to copy a pattern or even a song (chain of patterns) between projects.
One way to implement this would be via the copy functionality currently implemented in patterns. Maybe could add one more field in the copy menu to have: copy from/to/number of copies and also a fourth field that lets you select to which project. The default should be to the existing project and if you selector click on that field it would take you to file browser to pick a different project and then by default set you to copy to the first empty slot (but you could pick any pattern slot you want). Could use similar functionality for Song but pressing copy while in song mode once that is implemented.