Hi Phil, re:

> I don't know if I should have approached this differently...

Well, the thing Burr mentions about having pieces that punch just partway through the other rather than skimming would have helped...

Also it would usually be good to do the boolean before doing the flow instead of doing it afterwards... But in your case here it's a bit more complicated since you have 2 pieces branching off in different directions, so I'm not quite so sure.

- Michael