Practical test: Strautmann Giga-Vitesse III DO plus forage wagon Working on the ‘Straut’ ‘Giga-Vitesse III’ suggests a machine built for speed and boasting a huge carrying capacity. Which, as it turns out, rates as a pretty accurate description of Strautmann’s flagship-but-one forage wagon model. This verdict is based on our profi practical field test experiences with the Giga III last season, when we tucked the wagon into a range of crops