sh*t, I lost >$500 on projects, and over 5 years of projects...

I was even making a Newton template system to sell. It had several different weapons, where you could input the bullet caliber and speed to get proper end-force on an object. An improved car template with more options, and ability to change the center-of-gravity (to prevent rolling, withm more drifting). Plus the option to control tire friction which was hidden inside the code.
You had already seen the player (in my signature). I never got around to improving that too much though - There were a few other things I made as well, but there's no point in continuing...