For this model you need an empty pusas coil and 4 ball bearings 608 ZZ.
If it does not have to run too smoothly, you can also print the ball bearings.
The top plate has a small marking on the underside to make it easier to find the position for attachment to the spool.
To avoid needing 3 hands for a short video sequence, I attached a string to the underside of the spool. After I have wrapped the cord around the spool, the disk rotates by pulling on this cord.
The author marked this model as their own original creation.