This idea has been lingering in my head the past days. Mod will be unranked. With this mod, during any point of the song you can press the corresponding mod key (ex. A = HR) and the map will become HR. Press A again to disable it. S=NF, etc etc. I can see a lot of complications with it especially immediate changes to the circle size and and flipping of notes. Just tossing the idea out there.