The file 'Headrest For Helmets 3D Printer Model' is (stl) file type, size is 259.5KB.
You need a kitchen roll holder like this one:
https://www.bol.com/nl/nl/p/classic-keukenrolhouder-roestvrije-staal-met-verzwaarde-voet-anti-slip-32cm/9200000074160509/
The headrest goes on top and holds the helmet in place, slightly angled forward.
Fits a variety of helmets.
If you need the hole's diameter changed, please let me know.
Helmet_rest.stl | 664.7KB |