finally upgrade for trapezoidal screw for 3Drag/K8200 V3

With this thing you can change the default screw (M8) with a trapezoidal srew 10x2 D. You must not move the motor and installation is really simple. You can read more here (Italian blog):

http://www.lillia.net/hack-barra-trapezoidale-asse-z-per-3dragk8200/

OLD VERSION:
bill of materials:
-1 trapezoidal screw 10x2 D
-printed parts
-1 coupler 5-10mm (for motor-screw)
-2 trapezoidal nut (one for moving the carriage and the other to secure the screw above)
-1 ball bearing (