keyline

By Badger

A slide hammer drives a chainsaw bar into the ground. The Tee cross allows it to pivot on ground and cut a trench. Back up and dive bar into slit farther along. Tried square and round bars instead of chain...

By Regrarians

Franck Chevallier has developed a open source subsoiler which is designed to be able to be built by local metal workers using readily available materials.