Sgisela Thanks for this comment! This is how the metronome has been benefiting me with this most recent piece, exactly as you said, to help me slow down or stay at a slower tempo. And as I think I said above, that really helps me to "reset" my internal tempo for this piece.
I don't think I've ever used a metronome for this purpose.... I've used it to help me speed up, and I've used it to help me get rid of gaps or pauses in the learning stage. But with this piece, I've already learned it, and playing too slow wasn't the problem.
It's interesting how I've played the piano for almost half of my life now (yikes!) but this never came up before!
re the visual metronome, do you use it when you're also actively keeping your eyes on the score?