How Do I Add another Bone or Something to Pose Middle of Arm?

Hi,

Does anyone know how to add a bone or something to the middle part of my robot arm to pose it better. I am using bendy bones.

https://blenderartists.org/forum/attachment.php?attachmentid=463746&d=1481604847&thumb=1

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maybe use 2 bendy bones, and in the middle put a constrain to limk it to a empty