side spool holder for prusa mendel i2

UPDATE 10/31/2014

• Now only two vertical bars are needed.
• Still aligned with the extruder movement.
• added 3 sizes of spool holders, and the source files so anybody can modify to other spool sizes.
• the old files and pictures are available also.
  ............
  Made to be as part of Prusa Mendel, using the same bars you used to build your printer and the bar_clamps from ( https://github.com/prusajr/PrusaMendel/ ).
  This is inspired from de PrusaMendel design and the new parts are derivated from the bar_clamp from the same model.
  You can download the STL files or the Rhinoceros file and modify as you like.