BoundryPolygon: does it work?

[Deathbane27]

BoundaryPolygon worked as expected when I experimented with it (which was... what, 6 months ago?), but I only tried it on Page elements. Might want to try putting each conc bubble in a Page and set the BoundaryPolygon for each page. The conc bubbles use DynamicData so it should work.