I have given up any pretext of living a conventional life and am building an airplane in the main living area of my house, which is massivly relaxing, and feels right/normal, which it didn't without the airplane.Which is to say that I suspect building X/pinball machines is the same.
I'd completely forgotten, but this brought it back. In the 70's, the father of a friend in high school was building a plane in the basement. I remember there were pieces spread all over, and my friend was telling me how much easier it was, as his father was using all metric system measurements.
This sounds fascinating, are you documenting this in any public way for those of us that are inevitably curious on the details?
Pinball machines are great entertainment, but a plane? Wow. Someone next door to me, when I was growing up, built a boat in their driveway. It was amazing, and they took a long time to both get it right, and to make it seaworthy and comfy. After launch they sailed it around the world. Amazing.
"Massively relaxing and feels right/normal" instantly reminded me of hobby tunnelling.
https://en.wikipedia.org/wiki/Hobby_tunneling