Update 05.05.2023:
I added a solid version of the design so you can basically choose your wall thickness by setting the perimeters as desired or print solid resp. with sufficient infill if you don't trust your filament ;D
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Additional Spool Holder for the Elegoo Neptune 3 Pro with great fit direct after printing.
Prints great with .28mm layer height and 3 perimeters
The author remixed this model.
A solid version of the Holder was added in order to be able to beef up the strength.