I Didn't like/Couldn't Use ANY of the spool holder bushings that I found already designed for the M3D Spools successfully... (They would keep walking out of the spool and then my spool would drop onto the spindle of my filament holder and everything would get all screwed up...) Soooo... I decided to redesign one that would work. It was designed in ScorchCAD for Android which can be found in the Play Store... These Bushings work well with: THING 705345 (It seems like after browsing that most people choose this spool holder first anyway (>.<) Or with any spindle size under 14mm. Leave Me a Comment, Let me know what you like, what you don't like, Improvements, Ideas, etc. Most of all I want...To see YOUR makes of this!! If you have any other things that you would like designed for your micro give me a shout, If I can do it & I have the time, I would be more than happy to help (^_^)Printed on the Micro by M3D Neon Orange Using M3D Beta Software v1.3.6 Filament Used was M3D Onyx Black PLA @ 215C Print Settings used:                                Medium(Slow) Print Quality                                Medium(Slow) Infill                                Supports - NO                                Model on Model Support - NO                                Wave - Yes                                Raft - YES (but its really up to you, I just wanted a cleaner look for the outsides of the Bushings, they don't NEED a raft to print successfully in PLA ;-)