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 concrete.

Edging lends a crisp, clean, finished look to a flower bed. It also keeps the lawn from migrating into the bed and mulch from migrating out. Additionally, certain kinds of edging have a wide surface ...