Hey Tydorius ... thanks so much for this tool. It works just as expected ... but I have adjusted it so that it will create the TSCN file with the following structure:
Node3D (Name of original FBX file)
|- MeshInstance3D (as per your script)
|- StaticBody3D
|- CollisionShape3D (as ConcavePolygon so it is shrink-wrapped)
Then it saves the TSCN file. I didn't have your email address to send it to you.
Craig