Piper 1 was featured on Hackaday as an alternative to cheap Chinese 3d printers: https://hackaday.com/2018/07/05/open-source-diy-printers-are-alive-and-well-what-we-saw-at-errf-18/
Interview to Inside The Mind of Matt youtube channel
Interview to Inside The Mind of Matt youtube channel on current and future Piper 3d printers.