Yep EvilSOB, I hang a box behind the car, so it rotates better, and play with mass abit, not too much of course!

the FINAL thing that needs fixing, before I can go on with textures, lightning etc.

Each satelite holds 4 cars, and these cars are tilted with 5 degrees, take a look:







If you look closely, you can see they all standing with 5 degrees on the satelites, and then accelerate by gravity, how to achief this 5 degrees tilt which does also work with mass?

The code XD1v0 provided did the job for the satelites and platform, but the cars need some different rotation, and it really MUST work together with MASS, if I can't use MASS, I won't be able to simulate the ride correctly!

Thanks so much