Chris;
I don't want to rain on your parade, BUT...
In the video, he shows them turning even down to 2/mph, however he does not show or even mention the output of the PMA.
High-torque is good, IF your PMA is possibly a single phase unit and or needs to overcome cogging, BUT means very little when battery charging or trying to get them up to grid-tie voltages.
You could call them, and let them know you have them and in what wind speed you'd expect to see any battery level voltage output.
See more blades isn't necessarily a good thing, more blades on the old water pumpers works great! high-torque is needs, I saw about 5 of the old water pumpers just south of Iowa City, IA on highway 218, running nice in winds less than 3 mph, but all there were doing was pumping irrigation water.
Also , further down in the specs you'll see the blades aren't actually 59" in dia, as the hub is 11" itself so you only have 48" blades
NOW I will say that you can certainly do some "stuff" to get this up and running, by doing a rewire. Go searching on here for Jerry, he did some stuff with these for low wind that can help you out.
Best of luck!
Bruce S