ART rigging script, Facing direction flip-flops and other confusions

Hi There,

I am very confused about how forward facing is being handled between Maya, the ART rigging tool and UE.

UE considers +X to be forward right?
But the ART rigging script sets the character up with -Y as forward(!).
When I export this via fbx and import the mesh into my char blueprint it is now facing +Y.

Is there something I’m missing here?
Has anyone hacked the ART scripts to change the behaviour to face +X?
Does anyone know why after fbx export->import the facing has turned 180 deg?

EDIT: I tried to just add a rotation to the mesh component in the CharBP but in the AnimBP the facing direction didn’t update and is still wrong, causing problems with my vector operations.