Better Spool Holder for M3D Micro 3D Printer

Here's a better version of the spool holder that M3D links to. It's not nearly as over engineered, it's one part, it prints easy, and it doesn't break every time you try to put the spool on like the original.

If you're using the M3D with PLA, print in with 'fast' with 'medium density' and you should be set. (I didn't use a raft or wave bonding)