I've only seen one mod out there but its far outdated and I'm not sure if it was even functional. Is it possible to have a separate piece (the spinner) spin depending on the rate of speed or movement? Here's a pretty decent and short video about what I'm talking about: I cant seem to find a tutorial that surrounds this topic and I wouldn't mind putting in work to make this happen. I think having something like this would be fun to look at while driving lol