He never mentions what the part is going to be used for, but at 376 x 376 x 250mm (14.8 x 14.8 x 9.84in), he estimates that this is the biggest single part printed with a DIY 3D printer.
The result is the DIY Embroidery Machine V2 which leverages 3D printed parts and common components ... but this new design really takes advantage of 3D printing as well as the increased ...