Kossel Mini Offset Top Mounted Filament Spool Holder

I Like the top mounted Kossel spool holders I have seen on thingiverse, but since I mounted my extruder on top and I have some spools that are larger in diameter like those from Hatchbox, I needed to offset the center spindle toward the front of the printer in order for the spool to clear my extruder. Like elmuchcho (http://www.thingiverse.com/thing:371881), I used a 3.5" HD bearing. Mine is from an old Maxtor HD.

I borrowed the spindle and centering cone ideas from the CreativeTools design.