The Irish-built Erth Engineering PanBuster is a mounted machine available in 2.4, 2.7 or 3.0 metre working widths, equipped with 3, 4 or 5 legs accordingly. In shear bolt set-up, those legs can operate down to around 500mm, while the more popular hydraulic auto-reset version allows working depths of 350-400mm. The design of the system uses high- specification NIKROM rams which have a small internal volume and large ports to allow quick reaction to objects, and marine-grade plating on the ram spears to resist pitting. Depth control is via a full-width smooth roller assembly at the rear of the machine which incorporates a hydraulic-nitrogen accumulator to allow smooth movement over undulating terrain. The action stops roots from becoming waterlogged in a wet spring, but equally free to move through the ‘eased’ profile in a dry summer”.