I had figured that’s roughly what you’d do (have multiple meshes), however your damage system will fall into an area of issues resulting from Vision Lag as Roblox currently offers no predictive pathing for vehicles. Or atleast, I’m assuming that apart of the damage systems for a demo derby game is damage when running into each other. That can lead to some faulty stuff happening when a user sees a collision in one way, but the server sees it in another. I’ve worked on a system before that account for driver to driver contact giving players a certain damage percent, and that can be super bad for two players who are somewhat lagging.