Body tracking robot and Blender

Has anyone successfully

  1. imported Apple's (FBX) robot for Apple's CapturingBodyMotionIn3D demo into Blender
  2. exported it back out (GLTF or other format)
  3. converted it back to USDZ via Reality Converter
  4. and gotten it to work in Apple's demo app again?

I have run into numerous problems, and each effort to fix a problem leads to new ones. For example, importing Apple's FBX robot has the bones pointing in funny directions (see attachment).

When I try to correct this on import by aligning the bones, the robot in the Apple app looks like it went through Star Trek transporter accident - limbs at weird angles.

Body tracking robot and Blender
 
 
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