That's awesome...thanks man. It's a little quirky and takes a while to trace the coastline (imported from FTpro), but it works great. It was exactly what I was looking for.

Here's an example I played around with after reading your tutorial.

Click image for larger version. 

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The current project I'm working on is a series of maps that will show an empire's expansion over a long period of time, so the political borders are kinda fundamental.

Thanks again.