My design of a spinning top with a geared puller.

For stronger pull-rack try:  [https://www.printables.com/model/98919-stronger-pull-rack-for](https://www.printables.com/model/98919-stronger-pull-rack-for) 

SETTINGS:
Spinner top part: Layer Height: 0.15 ; Infill: 80-100%
Spinner bottom part: Layer Height: 0.15 ; Infill: 80-100%
Spinner screw: Layer Height: 0.15 ; Infill: 80-100%
Housing:  Layer Height: 0.20 ; Infill: 20%
Pull Rack: Layer Height: 0.15 ; Infill: 100%

No support is needed for any part if correct orientation is used, see print orientation picture.