Unity AR Tutorial - Importing Modifier / WSM / Space Warp animations from 3ds Max

This video explains the process for correctly importing animations into Unity from 3ds Max when those animations use Modifiers / World Space Modifiers / Space Warps. By default, they won't import correctly. Instead you need to convert the spatial transformations into vertex transforms via Morph deformations. This method and the script come from the video at: https://youtu.be/yaUOR76FxYU. (Much appreciated!) But that video does not have any voiceover or explanation. A modified script, which you will need, is in the comments below. Hopefully this will help someone....