I'm new to rFactor and actually waiting for the upcoming sequel (didn't like rFactor 1). I'm also interested in car creation. Here's what I wondering, since this is supposedly to be a mod-friendly sim... Ever considered implementing some sort of simple scripting language for the actual car simulation? Various top-end cars have intricate traction and stability control systems. Having some sort of scripting possibilities that run next to the physics simulation would be great. Scripts could take input from various sensors, do their calculations and adjust various clutches, power distribution, suspension characteristics, and so on. Car modders could make use of this and try to create approximations of various systems. A good example would for instance be the Nissan GT-R, which has a pretty extensive control system, yet no game simulates any aspect of it at all.