This pied piper mouse lured me in with its promises of complete adjustability but it's very clearly a demon in disguise

"If you gaze long enough into an abyss, the abyss also gazes into you." That's Nietzsche. Having died in 1900, he didn't live quite long enough to see the PyottDesign Statial.b (via Hackaday), a mouse that can be adjusted in more ways than I thought possible. If he had, he might have instead said, "If you spend too long developing a completely adjustable mouse, stop."

What Nietzsche arguably meant by his abyss comment is that if you spend too long searching for meaning by contemplating an ultimately empty reality...