Very interesting! Thanks for sharing.
One thing that keeps me from 'blindly' adjusting focus based on temperature is focuser backlash. How do you handle this, especially how did you measure it (assuming you do have some)? One of the reasons I do like Hys focus routine that is insensitive to (at least small) BL.
An EKOS module to automatically compute focus backlash would be a nice thing 
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