Controls for FK-IK arms, IK arm space-switching, and lung breathing, can be found on the "MSR_CTL"

Recommendations

• Link "Gillpole_ASSET" collection into new scene and make a library override, to avoid accidentally altering the original rig file.
• Do not animate the transformations of the "MSR_CTL".  This should only be used for placing and scaling the asset within the scene.
• Set Transformation Orientations to "Gimbal" for rotations when animating.