In Fall 2019 I designed a hybrid steel-composite space frame for Cooper Motorsports for the 2020 season. The cockpit structure was revised for improved ergonomics while reducing weight and improving stiffness. Carbon fiber composite panels were added and iterated in location and layup schedule to yield the minimum weight to meet our stiffness target of 10x the difference in front and rear roll stiffness. All non-structural tubes were re-evaluated compared to earlier designs, with many being reduced in size or eliminated, while others were added to improve load paths. The final design is 13% lighter than the 2019 design while being 50% stiffer and with reduced suspension compliance under braking. The completed frame was in the process of being tested using a team designed torsion testing rig as the COVID-19 pandemic started.