This is a simple spool holder for RepRap Mendel and Prusa. It's compatible with multiple sizes of spools and makes swapping spool easy. It uses the y-bar-clamp from the default Mendel.

1. print out plastic parts ;)
2. cut 4 pieces of threaded rod of the size to your liking. Somewhere between 15 and 25 cm depending on the size of spools you plan to use.
3. cut one piece of smooth rod of about 40 cm
4. put the y-bar-clamp on the upper bars of your RepRap, with the threaded rods
5. put the spoolholder plastics on the threaded rods and put the bearrings in them.
6. Stick the smooth rod through the bearrings