Retargetting Quality low on SAME RIG

Hi gang,

I'm currently using a humanoid rig I've configured to work with Mecanim and several other plug ins. When importing my idle animation, however, the retargetting is very bad on the legs. I'm using my own rig that I made in Max and configured in Unity. I've then imported an animation FBX, copying the avatar from the humanoid rig I configured. But when this animation is called upon by a controller, the result is off.

I find this hard to accept as it's the exact same rig. (I've tried importing the animation just as it's own rig, and it works fine until I then call upon the animation to play in controller - it retargets again and does it badly)

Any help on the situation would be amazing, thanks.

Rory.