Machining of the chassis was originally done by hand in our basement; now it’s done professionally, by a machinist with a CNC mill in his garage. We still handle design-change rework and repairs here, though. Getting this mill/drill into the basement took four strong people and a promise of beer.
The sunroom is a pleasant spot for the electronics workbench. This is where all the production soldering and lab-bench testing happens, as well as prototyping and repair work.
Some people say our idea of quality time together is strange.
Every unit is thoroughly tested on the lab bench using an Audio Precision analyzer, and then tested again by me playing through it.