There’s something amusing about my 4y/o saying “happy, happy, happy!” while aggressively stabbing a box as big as him with a cheerfully yellow pencil crayon.
@mattiem I used a audio DSP and amplifier board designed by someone who recently launched this company doing custom electronics design: https://zotec.nl/
Depending on what you’re interested in I also have a friend who designs audio electronics such as synthesizers.
For metal and wood fabrication I’ve found a few people that do it locally through Facebook Marketplace and have used their services.