@VRonin Awesome thanks! I was able tho to just grab the 2 files and use them directly so yay!
This tree model is epic. It does 90% of what I wanted ! Now I just gotta figure out how to hide parent/groups, so I only see items, but that should be fine, super awesome, thanks!
Edit1. using sort filter model later to decide if I want to show parents/etc worked just fine, yay!