Introduction
Use this guide to remove the expansion module in the OP-Z.
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Unlock the four rubber feet by turning them 90° counterclockwise using your thumb or finger tip.
 
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When turning the OP-Z over again the bottom plate should come off by itself (thanks gravity).
 
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Use your finger or a spudger to push up on the small tab on the bottom of the module.
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Lift the module up and out of its recess bottom first.
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.