Changed some things from the original:
no need for screws with the pins and rivets (Use some CA glue)
The cover plate has been changed to remove unneeded material (The interior dimensions of the plate will fit over a standard light switch cover, you can just take the screws out and re-screw with the new plate on top. I would demonstrate, but my apartment has oversized switch covers.)
Removed the ON OFF text and the arrows from the arm
The 4 pins/rivets are used for the gears and the arm, and the thinner 2 are for the center gear
Had to drill the holes for the switch a little deeper, as the screw head when secured would prevent the gear from rotating, easy fix, maybe your light switch screws will have flat heads and you won't have this speed bump
The author remixed this model.