I met mark (the guy who owns the bike above) on wednesday last week. He had to custom fit the brake to the motor. His info can be found on this thread: http://endless-sphere.com/forums/vie...?p=40219#40219. His disc brake is drilled directly into the side of the hub motor. and then fitted from there. there wasn't a lot of spare room to run the brake, and he also HAD to use an 8" rotor, otherwise he wouldn't have been able to fit the caliper over the disc.

His torque arms are great, they can support the bike without the use of the dropouts themselves (ie if they fail but the torque arms don't then the bike will still work. 4011 on the front as abnetcat said is MASSIVE.