Blender - zipper rig

How to use this rig

• root control
• red diamond (when zip closed)
• yellow sphere (when zip is open, both side is controllable)
• green gear (zipper slider)

About this rig

• use bendy bone setup as a supporter for DEF-bone to position.
• not using bendy bone for DEF-bone.
• use script to generate drivers, easy to amend when need to increase bone numbers