To assemble you will need 2 m3 screws and 2 m3 lock nuts and two m4 screws and a rubber band or a few rubber bands for a stronger spring. The m4 screws go on either side of the channel to hold it in place and you use a rubber band to spring it. When building the shaft make sure the squares/rectangles line up they are there to show how to assemble correctly.
The author marked this model as their own original creation.