Very slick install. That's probably the cleanest cut setup I've seen in a while. It makes me want to get a hub motor (almost). If I wasn't digging the efficiency of my build and the fact that I survived a 20mph wipeout and the only damage was to my saddle, I'd probably go with a setup like yours.
All in all, you made out quite well with a very stylish Urban E-Commuter.
Good Job