Room size? Several examples that is home made and about the size of a hand (this from 2014): https://richrap.blogspot.com/2014/12/no-more-filament-quest-for-uni

Room size? Several examples that is home made and about the size of a hand (this from 2014): https://richrap.blogspot.com/2014/12/no-more-filament-quest-for-universal.html?m=1 https://richrap.blogspot.com/2014/12/no-more-filament-quest-...