I have made the 4 wheel variation of this model from Tessier.work, but having a lot of trouble with PLA is constantly breaking and I would love to perform a couple of modifications to the design. First, it does take away from the look, but if the tire supports A frames could be adjusted with a angle so that the car would sit higher off the ground the car could be driven in grass and some soils. The Steering needs to be adjusted so that the turning radius is more gradual rather than overly sharp. And lastly I would love to find a way to make some of the parts more robust maybe by printing out of metal of being able to add metal inside the parts, in particular the drive train breakes to easily with the strength of the motor.