SummarySpool holder for an Z morph. I have included the spindle simply to allow people to modify and measure it if they want but I used a piece of Diameter 10 x 110 mm long bar. The nuts and bolts are M4x10 and M6x30 with an M6 thin washer to act as a spacer for the roller. I also put a Dia 6 Bore x 12 OD x 4 thick bearing in the roller. The filament goes over the top of the roller and it works ok. No snags so far.