With a Bambu printer, you are used to the luxury of a "screen saver", i.e. the screen simply switches off after a certain x amount of time. The Ender 3 Neo doesn't do that. And if a print lasts several days, the blue light of the display at night is like a mosquito buzzing around next to your ear. A neon sign lighting up your house, or the reason your kids can't sleep because of the weird light in the basement. Put the lid on and it's dark. ... Of course. I might buy an upgrade kit for the display ... yes ... but why? It works and the problem is solved with a cover. So ... that's why. And I'm not the only one with this problem either ... so ... why not share?