Animate "SK_Elemental_Robot" from "InfinityBladeAdversaries" with Control Rig

Development Character & Animation
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1

Hi,

I want to create a control rig for the Robot character from InfinityBlade but It have 2 calves on the legs, which I can’t figure how to create FK for, when I rotate one of them the other breaks, plus when I use “IKThreeBone” for forward kinematics I can’t figure out what I must put on Primary Axis because the calf breaks into 2 and goes the other way around.
Here is the part I need to FK :

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image1293×938 74.5 KB

And the Blueprint I am writing :

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image580×875 81.6 KB

Thank you,