Duplo-to-chuggington train coupler /adapter

This is a remix of @KimHolse_1600580 Duplo train hook to connect two train waggons with identical male couplers on the waggons/coaches/trains. Here, the one side side of the connector is replaced with a spherical male coupler as it is used for connecting Chuggington trains. 

The model is not ideal, especially the Duplo side of the connector seems to be a bit too loose. I will try to update it to make it a tight fit. The make is printed with the following settings

• Printer: Creality K1
• Material: PLA
• layer height: 0.08mm
• orientation: lying flat with minimal support
• I increased the infill density to 60% as it might receive strong external forces from children