Vuforia edit scripts referencing standard project scipts

We were in the process of attempting to edit DefaultTrackableEvent, a script provided by Vuforia for custom integration. However, we could not import our custom class, even if we assigned a namespace manually. We have a class Fader.cs
```
public class Fader : MonoBehaviour {}
```

Vuforia cannot find Fader class. I've also tried:
```
namespace myNamespace {
public class Fader : MonoBehaviour {}
}
```
Vuforia can't find this, with using myNamespace, and other using refs. How would I reference a standard script from Vuforia. In other C# projects you would need to add a project reference, but this doesn't seem to be possible in Unity.

Thanks for any tips,

 

Looking for same!! did you find any solution? @BobbyDoogle