Railcore II Filament holder

Filament holder for Railcore 2 300ZL and some brackets. No support in the post required. Added brackets and base for left side holder. New right side base and support to better deal with 3.5kg rolls.
Ad spool holder thing:2431785. This holder has a 5/16 threaded rod and 608 bearings to distribute weight. Do not try to hang a 3.5kg roll from regular filament holder as it might break.

Empiricus@Dremomys