Coil flipper noise is a number one issue. Was speaking with PinMonk about that some time back. He always seems to have some good advise about how to fix issues like this and told me about a company in Europe that sells sound dampening parts, but he’s yet to give me the place to buy them. He thinks their product dampens flipper/pop coils around 50%. That would be huge imo. Hoping he can find the place he was speaking about. It’s a real issue in our home too, with young children and such. Can’t play when anyone is sleeping taking a nap, lol. Even with headphones on, sound still jarring for everyone else.