M3D Micro Filament Spool Holder

So... After M3D's model almost literally broke my printer, I have redesigned it.

The file named _try2 will probably print a little better. I did a little filing on the first try piece - which is 1mm larger in diameter (39mm for the old one, 38mm for the new Try2 one). The hook design was a little painful, too, to be honest - I'm going to redesign that at a later date.

This is based off of the model from their website for an external filament spool holder. M3D's design was a 3-prong piece t