Rigidbody and convex mesh collider

I’m experimenting with some spaceships, I downloaded this nice cool spaceship from Asset Store.

Ship

As you can see, mesh is convex. But that doesn’t work. I have to have mesh non-convex, but its not supported in Unity 5 anymore. The Shielding doesn’t work without non-convex mesh.

Ship has rigidbody of mass 100.

Give the ship object multiple convex colliders.