Fancypants Giants Causeway spool holder (20 mm ID)

I was working on a spool holder design that holds a spool at 45° so that it can be printed as a single piece without support, and I went a little wild. Hexagons are easy in Tinkercad, and this arrangement brings to mind the Giants Causeway rock formation, or a pile of rubble on a shoreline being licked by surging waves.

This holder can accept spools with a minimum inner diameter of 20 mm and a maximum outer diameter of 70 mm. The holder should work with spools of any height. The bottom of the