Skid steer track loader concept. Round ROPS shape makes it easierto right the skid steer if it rolls and gets stuck upside down on its roof. This is a 2006 redesign of my very firstconcept machine done in ProEngineer back in 1999. The ROPS and rear engine bonnethave been completely redesigned. Otherwise the drivetrain, engine/coolinglocation, chassis, loader assembly and operator station have not changed muchsince the original 1999 version.