if you save what you like, all elements, then changing or performing it to your heart’s content is fine so long as you don’t save again any of those specific elements or slot references

then just reload after you’ve messed about

yeah projects should probably be looked at as the safest way to keep individual groups of highly related ideas together, probably simplest conceptually, then you just have to deal with navigating around projects and saving them etc

if you go into the sysex receive side of the A4 you can direct the import, it generally doesn’t overwrite as such, it’ll be in +drive, if there is space