I wish there were a grand staff for instruments that don’t center on middle C quite so decisively. The harp’s real stomping ground is about a fifth above the piano, and that means a lot of stuff that is many ledger lines too high up in the right hand, and lots of clef-swapping in the left. 😦
Oh, well. I’d use this trick, but it would run over the lyrics, which I’d like to include on the sheet music.