Dremel Bit Holder Adapter for Workstation 220

The Dremel Workstation 220 has a slot where supposedly one would fit a Dremel drill bit holder, grey in all DW220 promotional pictures. However, the newer Dremel drill bit sets (blue) are narrower, and don't properly fit the slot. So I've designed an adapter that slides in the slot on the DW220 and holds two such bit sets (see photo). I've printed it in black PLA, upright, with supports where touching the buildplate.