Spooler Prusa i3 hephestos

I modified the spooler to make it easier to change.
Added a hole to fix the spooler to the Prusa letters with a M4 screw.
I use this clips to fix the rod:
https://www.thingiverse.com/thing:12516

You'll need two 16x8x5mm bearings (outer x inner x width).