When I read the title I remembered how people in the 90s at my place built their lawn mowers. It was a new thing. My father welded the frame from scrap metal with the motor from a washing machine and some tiny wheels from an old baby stroller lol. It was kind of open source, many people copied or he helped build one. Haha, served us surprisingly well for a time :)

https://news.ycombinator.com/item?id=44946996#:~:text=When%20I%20read,for%20a%20time%20%3A)