PS: It is also wise to to provide an opening on the underside of the table top or anti-torsion box to access the screw the farthest away from the stepper motor that loosens the front end cap of the lower tube with a 3 mm hex key to service the inner wire and the connector or the be able to replace the stepper motor. If you don’t have such a service hole in your table, you’ll have to disassemble the entire machine to access the inner tube motor wire 
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