Hey, I'm trying to export a skeletal mesh to UE and still can't get it done right. Any help is appreciated!

My steps:
1. Turn a kinefx rig to an agent (agentfromrig, then agentlayer with the named skinned shape coming from bonecapturebiharmonic)
2. Import it to LOPs via Create SOP
3. Configure primitive agentdefinition to disable it and make not visible.
4. Import USD to Unreal

The problem I get is that the Skeletal mesh doesn't import correctly in UE -- I get issues with normals, mesh flickers with black color, and on more complex geometry the skin weights are totally messed up.

The scene and the usd file attached.

Still relevant. Anyone?