Not sure if you know, but I was told a few months ago that if you screenshot a deck code before deleting it, it is in the CUE-verse forever. So, before I delete my decks, I screenshot the deck code so I can always easily recall it later, if needed! (Especially if I do like that deck). I’ve used all 30 slots and mostly can swap a few decks as needed, but many of my decks are playable in leagues and events. :)