Masterspool lasercut/3D printed

Mashup of the lasercut masterspool from thomasdr, printed core with printed retaining nut (thread stolen from my lens adapter focusing thread ;) )

Doesn't need any hardware nuts/bolts so only needs PLA and 3mm wood (2.5mm or 4mm could also work).

~80gramms for the PLA and ~140gramms of wood

**Why there are two spacer dimensions: ** 47mm is the 'official' width, but I reprinted it with only 46mm width.