1kg filament holder

I made this to hold my 1kg filament spool.

The holes are made for M10 rod and the ball bearings the spool is resting on is 30mmx10mm and 9mm thick (6200 2RS).

On one side i have Nut, Washer, Holder, Thin spacer, Bearing, Washer, Nut, Thick spacer, Filament feeder, Thick spacer, Nut, Washer, Bearing, Thin spacer, Holder, Washer, Nut.