We didn’t notice [Nikita]’s post about building a concrete 3D printer, a few months ago, but the idea seems sound: build a basic CNC XY axis and then add a mortar pump and hose to deposit ...

If you're ready to get stuck in, head over to the Lemontron 3D printer build guide, which includes the download file for the chassis and details on how to use all the parts to make your own printer.