SIMPLE AND FAST WAY TO MAKE A SPOOL HOLDER FOR ULTIMACHINE PLASTIC. ALSO ALLOWS TO REMOVE SPOOLS QUICKLY, OR EVEN TAKE THE WHOLE ASSEMBLY OFF FOR TRANSPORT. SPOOL HOLDER IS A MUST! PARTS COME OUT BETTER WITH LESS DRAG FROM THE FILAMENT. PRINT 6 BAR CLAMPS PRINT 2 ULTIMACHINE SPOOL SPACER ( http://www.thingiverse.com/thing:7907 ) CUT 3 M8 RODS (250,250,375) ADD NUTS AND WASHER BASED ON PICTURE PROVIDED TIGHTEN NUT ENJOY YOUR NEW IMPROVED MENDEL :-)