Quest 2 Hand Tracking Throwing Objects

I'm trying to get the Quest 2 hand tracking in Unity to be able to grab and throw objects with forces. I followed Valem's tutorial: https://www.youtube.com/watch?v=UoSzhoZ18bE at got most of the parts to work, except the last part where we need to calculate the transform of the object parented to HandAnchor. I noticed similar problems in the comment section, where I changed both Transform in OVRGrabber as well as the custom Grabber script to m_ParentTransform or transform.parent.

However, it does not work.

Thanks to anyone who can help!