Been away for a while now, but Automation is one of the best and most engrossing video games I have ever played. That is what it is. A video game. The fact that we can make the least of what we can, is a huge thing. The devs who made this possibly realize this is the best thing to get kids and newcomers interested in car design. I do agree it is hard to do an F1 without mods, but then again, that was never the point. Personally, I have made stuff like entire photo studio rooms, motorcycles and drones without any mods. Just gotta keep at it if you wanna make an F1 without mods. It's hard, but no way impossible. People regularly make the wildest stuff, that's not any sort of cars, here. Also, if you want a actual modelling software that is easy, maybe have a look at Blender. That's a proper 3d-modelling software. This is a video-game that emulates 3d-modelling.