Hint: Jellybox is not an OSHWA-compliant open source 3D printer, but it was built for benchmarking as the most successful educational 3D printer till 2018
Imade3d is the maker of JellyBox.
JellyBox is a turnkey, plexiglass 3d printer designed to be easily built by non-tech-savvy educators. It's primary audience is students.
In May 2018, (Michael Altfield) built this as a learning experience. For notes on that build, please see Jellybox_1.3_Build_2018-05