Andrew Grinsfelder yanked on the pump to get it started. A hose snaked out from one end, a tube fed into the pool on the other. Demonstrating how to use the pump in the backyard of his family home ...
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 ...
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