Leak Problem - Event Date: 20 Sep 2017

You may want to consider leaving some way for air to enter and water to drain without exposing it to more water entry as it dries over the winter.  I was going to say that hopefully you live in a climate where freezing wouldn't be a problem, but I see you live in Minnesota.  I wonder if there is some way you can blast a bunch of warm air through the bottom of the spoiler before winter comes,  ... next week 🙃.  On the other hand, if a little condensate and water drops freeze it isn't likely to hurt the wiring or lights like it can with plumbing.

I've had the roof seal tape on three sides of the spoiler, leaving the bottom open, for about a year with some pretty windy storms and have experienced no leakage.  It could be dumb luck, or maybe I actually sealed the spoiler up successfully.  Only r-Pod goddess knows for sure. 😎

The factory caulks or attempts to caulk the spoiler all the way around.  But when I sealed ours with Eternabond, I applied it only to the top and sides.  As for windows, our leak was definitely not the window, though windows can leak.  The proper set for a window is butyl tape all the way around.  If done correctly, the window should be leak free "forever."  That would be the correct caulk for the spoiler, too, if the spoiler could be uniformly snugged down to the roof.  But it can't be.  

Here's my take on the spoiler,  spoiler is black, that's the worst possible color, baking in 100 plus temps something has to pop. That's why I made my own, no caulking needed, rubber gasket, weeping holes at the bottom and a couple vent on either end.