Hmmm... I'm not sure what was going wrong when you tried, but I moved the region-box-drawing up into the code that extends the boxes(for creating the polygon regions), so you can see how they overlap now.

Anway, I ran the current script on that head again...

last time: 300 (more or less) misses out of 1200
this time: 14 misses

...with a lot fewer false hits.  So the good news is that we're getting closer - the bad news is that there are still some false hits and still some missed hits :).

I'll look at this more if I get some time later tonight.

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