The VRCFury setup is relatively simple.
If you need to scale the system only scale the Parent object of each prefab. Try not to scale any of the gameobjects inside the prefab as that may result in undefined behavior.
Drag and drop the GunnerHalo Prefab from the “_Prefabs” folder located under “RuneFox/GunnerHalo/_Prefabs” onto your avatar.
Find the Left and Right Hand GameObjects under the Armature Links gameobject. You’ll need to move these so that the objects inside of them are lined up with your avatar’s hands. I lined mine up with the index finger specifically. Use the blue and red halos as guides. You may have to rotate them slightly. Depending on the Avatar’s hand gestures and what controllers you use you may need to readjust these later if you don’t like how they look.
Find the Head GameObject and line it up with your avatar’s head. Same as with the hands, you may need to rotate it to better fit your avatar.
You should be good to upload the avatar once you’ve done the steps above.