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Arm Rig - FK Ctrl / IK Ctrl Relationship issue

Dogway
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Dogway null
Hello, I have an issue with arm controls. Basically I'm trying to replicate QuickRig's setup arm-wise, that means an IK Ctrl in the wrist, and an FK Ctrl near the elbow that rotates the shoulder Joint (moves whole arm). The problem is basically that when moving the FK Ctrl, the wrist IK Ctrl won't follow along, even if parented to it. I'm not sure if this is possible or involves some FK/IK switching or something, which is cumbersome for posing the character. I append a sample file with the setup if anyone wants to have a look.
I also have an issue with the Leg Roll, it's trapped within the Leg IK Handle so I'm not sure how to make it rotate 2/3 more than the Leg Joint without involving a FK/IK switch.

Maya 2018 Ext.2 Sample:
Arm Rig.ma

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