@UKB_VRT
You're going to need to turn off the rendered hands in the Unity Scene. These will match the data from the Leap Service provider.
You could then create new hands with any geometry transforms that you want. Pull the position data from the existing (but invisible) hands provided by LeapMotion. A simple implementation might map these onto a set of spheres and cylinders that together form joints and bones of the hands. Otherwise, you could work with some rigged hands.