Polaroid Precise Filament Holder & Scale fix

Polaroid Precise Filament Holder & Scale

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This holder is normal only suitable for polaroid filament spools. 
With this fix you can use all types and sizes of spools.

Fits on the black/left en white/right holder.

Shoppinglist
2 ball bearing 625zz
2 bolt M4 x 16
1 bolt M5 x 16
1 bolt M5 x 12
1 screw 2.5 x 10 mm (Not necessarily needed)