If you go in service mode and your Tesla says VCFRONT a210 coolant Valve Calib, you will need this tool to rotate the 5-way valve so it meshes with the actuator. You will also need their software called Toolbox and either a special cable if you have a pre-2019 to do the calibration or a simple RJ45 cable if you have a newer Tesla

In the service manual they call this tool the diverter valve wrench

I used 3 walls and 30% gyroid infill. This was plenty strong

Please note there is a filet on one side for easier insertion, and the line shows where the wider side is