I think this system looks like the perfect compromise between VXL motor size and weight and 1/8 (MMM) motor torque and cool running. At 2400kv it could be run on 3S without any issues... its a 4 pole motor so it would be extremely torquey but its only a 36mm can so its not nearly as big or heavy as the 2650 motor. Its a bit long so dremeling would still be necessary but only minor stuff... the biggest issues I had with fitting my 2650 motor were due to its diameter, not its length.
Im just wondering if anyone has or is planning on trying this system. I bet its amazing. When Castle offers just the motor for sale I may look at replacing my 2650 with it.