Thanks so much for designing and sharing this!
Works great on my he400i. Needed some minimal finishing but works just like the original mounts.
-Use ~0.1mm print height. I tried using 0.2mm and the tabs did not have proper adhesion.
-Had to reshape some of the hooks using a butane torch to remelt and flatten the tabs with a blade... Be careful, it's hot.
-Use supports as thin / minimal as possible for easier removal.