That is truly amazing. Like you said, tens of thousands of hours sitting in a very small spot carving the tiny little cams and actuators would drive most people batty! Folks think the engineers at Apple and Sony are the most brilliant ever, truth is, they take a thousand people to design a device with the highest tech machinery ever imagined, this guy built this with a tool pouch smaller than my granddaughters backpack, all by himself, 250 years later, its still working.
Another irony is the Apple or PC product is always defective out of the box, they sell it knowing its got issues then fix it on day 2. I bet the guy who made this didnt show it to a soul until the day it worked perfectly, then the wows of amazement were worth the wait.