DataTree Re-arrangement on Contour Output

This graph creates 5 contours across 7 cylinders.  I'm struggling to find a way to convert the output from a tree that has 7 entries with 5 contours each into one that has each contour plane's curves grouped together.  In this case, 5 layers... 7 curves for each.

I had thought FlipMatrix would work here... but it doesn't.

Suggestions?  I could write my own contour object in this case by intersecting planes, but is there an easier option?