I feel your pain but don’t give up. Data trees do make sense.
I’ve added my ‘Tree/List Viewer’ tool to your code. You can use the ‘Branch’ or ‘Item’ outputs if you like.
Sectionator_2020May04a.gh (291.9 KB)
P.S. Try connecting Flip instead of BBX to the ‘Tree/List Viewer’ tool.
Sometimes PShift (Shift Paths) works better than flatten so I also included (but didn’t use) a “smart” version of pShift I wrote recently.
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