Omni Spool holder
by Simonious, published
This is intended to be used with this: http://www.thingiverse.com/thing:21910 You can of course use it with whatever spoolholder you like.
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Print 2 press fit some m8 nuts (5/8ths) thread one onto an m8 rod toss on a spool of filament Thread the other onto the rod and screw it down hard, clamping the spool in place. Then I use a couple m8 nuts on the ends to make sure the whole thing has a fair bit of friction because I don't want the filament spool freewheeling and unwinding on me.