Looks good! I'm using a 4" pipe this year, too, but I filled the pipe with frozen bottles of water to keep the fog on the ground. Worked real well in the test run.
Both of those video's are awesome! I just made my fog chiller today...took about 15 minutes to make, and I got a 4" irrigation hose to use too. Haven't tried it yet though, but I hope they work as well as both of yours!
I just bought my first fog machine, a 400watt from Target. Hopefully it will be enough.
That's a great idea. I've only got a 400w fog machine so I don't know if mine would put out that much fog that quickly. Looks like your machines are powerful.