Driving impression: Fendt Trisix Vario It has been three years in the making – and it’s still only at the concept stage. There is no doubting the considerable time, work and money that have gone into developing the Trisix tractor by Fendt designer Robert Honzek and his team in Marktoberdorf, Germany, and the result is in-your-face dramatic. But does this massive and tech-laden monster have a commercial future?