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Hi ! I created simple but reliable masterspool for ROSA3D filmant samples about ~100g and less weight.
It's designed for reuse with reel (made from paper) that You got with refill.
Masterspool have diameter of central hole about ~50mm. I use that by myself because without that masterspool I must rewind filament samples on standard spool. It's small and comfortable to stack.
You must print 2 pieces - first for left side and second for right side.

• Upgraded version (V2) have 5 holes for end and 1 hole for beginning of the filament.

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