Us homebrewers can also been obsessive engineers as well apparently.
One guy starts with a pneumatic bottle capper out of boredom.
https://www.homebrewtalk.com/forum/thre ... se.168286/
The real fun starts on the bottom of page 5, another decides to add an automatic cap dispenser to his machine. What happens after that, all the machinists here can relate.
I know at least one engineer who became an obsessive homebrewer too.
A guy a few miles down the road from my house had been a manufacturing engineer for Eastman Kodak. They offered him an early retirement package about ten years ago, which he accepted. To fill his idle hours he took up homebrewing. A couple of years later the state government started a program to encourage the microbrewing industry, so he went into business. He and his son (also an engineer) built virtually all of their brewing equipment - tanks, plumbing, valves, pumps, a bottling system, the whole works. I don't know if they've turned a profit yet but they're having a great time trying.