One more test of the key tags. For this test I fused the tags to the constraining cord with small cylinders inside the tag holes and the price dropped to $8.88 (from $30). There definitely appears to be a huge bug in the pricing for the unfused item. The 3D tools recognizes the unfused model as being one part but the pricing algorithms recognize the unfused model as 6 parts. Things are not on the same page.
In case anyone is wondering the tag holes are 3.8mm diameter and the blobs on the ends of the constraining cord are 5mm in diameter. The cord itself is 2.1mm diameter.
ETA: One last test. I increased the diameters of the end blobs to 8mm and the resulting price is now $8.94. That means that there's some minimum differential threshold that is required when constraining loose parts on a cord that falls somewhere between 1.2mm and 3mm. However there's still that mismatch between 3D tools part number evaluation and pricing algorithm part number evaluation that needs to be fixed.
Last edited: Nov 16, 2018