Where I live it's flat as can be. I've thought about building a single speed (or in this case 2spd) with the SA2 hub. My idea was to pick the chain ring and rear gear I spend most of my time in on my road bike. I would take the rear gear and subtract 38% from it and that would be my rear gear on the SA2. I'd ride in overdrive(138% according to SA) and when I wanted something easier I'd kick it down and go to 1:1. I was also going to use the coaster brake.
Does this make sense?
Thanks!