This is a good looking model, but it has many issues. When I buy the tractor, the door is open, the back window is open, but there is no IC control to close them. There are also many log errors. I posted a screenshot of some of the log issues I'm seeing. Also, the tires need some give in them...when you hit a bump, the tractor leaps into the air instead of the tires absorbing some of the shock.

For what it's worth, I can't stand the lights shining in fake dirty fog. I know that seems to be a trend among modders, but it's the first thing I strip out when I head to the editor.