Printrbot Metal Plus Spool Holder

Minimalistic spool holder for the metal plus. Add as many of the "middle" brackets as you like for support for longer rods and more spools. A printable 17cm long rod is included, alternatively you could probably use a 7.5 or 8mm metal rod. (I haven't tried that)

**Requires 4 8mm diameter skateboard bearings, like these ones: http://www.amazon.co.uk/gp/product/B00EPNN62M**

There are three different variants of rod ends which might give you different results depending on your printer: a norm