Capsela Ingear IQKey connector

Capsela toys were rebranded as Ingear or IQ Key, but the new sets are not compatible with my old Capsela. I made a connector inspired by https://www.printables.com/model/275906-capsela-and-iq-key-universal-coupler/files with some modifications as I didn't have a perfect fit.

It works on both sides for both sets and one cross is slightly longer than the other (as the connectors have quite some difference between parts). This way, if it is too loose or too tight, you can rotate 45° and should get a good fit. For the octogons of the Capsela, I found a sweet spot.
I have also included the FreeCAD file if you need to adapt it.

Printed in PLA with 50% infill and no support