How to import fbx motion capture

Hi trying to use the quite frankly horrible mecanim system. I have a character, I made all the motions on the character in Motionbuilder and exported the character with no motion and then each individual motion -to save space on mobile. Because I wanted (hahaha) to retarget the motions to other characters (hahahahaha so easy) I am trying to use mechanin.

With old system anims play correctly on the character.

With new mechanim system I cannot see anywhere what import settings I should use for the motion files. Previously imported motion files don't work. Any combination of import settings seems to not work

Rig = humanoid, avatar = create from this model imports the anim but its a bit messed up.

Mechanin seems to not understand Pelvis = hips

Any clues?

any ideas?