7 Piece Design for the clip-on M3D Spool Holder. Useful if your M3D (or other printer) has issues printing large single pieces or i.e. starts shifting close to the edge. Made out of 5 Different Pieces, so just print the Pieces "2" and "3" twice, so you get all 7 pieces and can connect the two arms and stick the shaft in between. Based on http://www.thingiverse.com/thing:705345 but simplified and cleaned up a couple faces as well as the 3 piece per arm design.