3mm spacer (M3 bolt) BLACKOUT Quads

Keep loosing these silly spacers? Me too so I decided to make my own.

Printed on an Ultimaker2:
- Nozzle .4 but set it to .2 in Cura
- .15 first layer height.
- .15 layer height
- .2 shell thickness
- 100% fill
- Speed will vary based on printer and tuning. 25mm/s should work well on almost anything.

If you want to sand down to match your current spacers better set bottom/top thickness to .4 if you just want it close use .2.