@Andrew_Rowe Thank you for this awsom guide, saved me so much time!
I did upgrade from version OH 3.2.0 all up to 4.1.1.
Started with backup, than upgraded to OH 3.4.5-1, latest OH3 version. Rebooted.
How its done you can see How to best update from 3.3.0 to 4.0.2? - #6 by llegovich
After that did all step by step as in your guide.
Didn’t get a single error. Had to reinstall some bindings.
Thank you once again! Mby this will be helpful for someone else as well!