Install the large acetal gear as shown and described in the E3D guide.
Insert the M3 grub/set screw in the steel pinion gear and slide it on the stepper motor shaft with the screw facing closest to the stepper. This is described in detail in the E3D guide.
Align the top surfaces of the acetal and steel gears as shown and tighten the grub/set screw.
You can access the grub/set screw through the slot in the effector as shown in the first photo.
Assemble the idler lever and thumbscrew as described in the E3D guide.
You will have to loosen the M3 screw (circled in red) in order to insert the idler lever.
Insert the bearing in the heatsink as shown in the third photo.
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