Kuhn reckons that for a large grass rake, hydraulic rotor drive is the best way to peg noise and service requirement. Its two biggest semimounted models are the 12.45m GA 13131 (featured here) and the 14.70m GA 15131. These are high-output machines featuring full control from the tractor seat, headland sequencing, a boost function for front rotor speed and more. Compared with outgoing units the newcomers’ design aims to reduce weight: a GA 13131 tips the scales at under 5.0t.