Designed in 2022 and never built. This drivetrain switches between mecanum and 6wd by raising and lowering the center traction wheel. The traction wheel gets power from both drivetrain moto by mea of a spur differential gearbox contained within it. As far as I know this is the fit and only drivetrain of its doc with more detailed explanation: drive folder with rende and a .7z file containing an .f3z file: 360 share link: