Assign RigidBody Asset To Script

I have a script that shoots spheres with:
var projectile : Rigidbody;

I want to attach a sphere asset to the script, but it only allows me to attach an instance of the sphere from the scene.

The problem if I use a scene instance is once after it collides I call Destroy(gameObject) on it and then I cant create anymore…

So I want to set the script to use the sphere asset from the project.

What I am I doing wrong? (Unity noob)

I figured it out - needed to create a Prefab of the sphere

Make a prefab, and use that.