Heavy Duty Spool Holder for Kossel/Delta Printers

I designed this spool holder because I want to upgrade my printer for dual filament printing.
I love top mounted spool holders but they seem a little flimsy to hold two filament spools.
I need a Hard-Core spool holder for this...

The spindle takes two 608Z skateboard bearings and all the parts are reinforced.

ATT: The tightness of the ny-loc nut adjusts the drag on the spindle so the spools don't unwind by themselves.

Updated 15/10/2017 Dual Spool Mount is here !!!
https://www.thing