Custom Backpack for Bioloid robot

This is a custom backpack design for the Bioloid Comprehensive kit. If is useful if you are looking to replace the original CM-5 controller with something more modern, and need a method of keeping all the internal components confined in the body of the robot.
The dimensions are similar to those of the original case which holds the CM-5.

There are two versions, one with two large holes on the sides for slotting in large batteries (~2200 mAh) as they are too big to fit within the backpack, and another version without the holes.