I installed Hemeras in my Toolchanger and found that the Tool2 hot end fan and the Tool3 part cooling fan were too close together.
Shifted the Tool3 Dock to the right 7mm to give them more airflow when docked.
Note: You, of course, need to update your tool offsets, "pre" and "free" scripts. My offset is X26.9 Y41.30, and the loading scripts work well at X309.
Original model: https://github.com/e3donline/ToolChanger/tree/master/Hemera%20Direct%20Tool/STPs
The author hasn't provided the model origin yet.