Nice little feature pack, I really like stuff like this that teach you a bit more about the cools stuff you can do with MM. While adding those little details that make the game-play experience that much more fun and rewarding. Nice job and thank you for sharing!
I've tried to set despawn to false, but it still doesn't work when restarting the whole server. (PM me if it works for you)
And about that renaming, I'll add it.