DJI 3510 350KV motor is one of the best crafted motors we have seen as of 2016. The technology behind this motor will deliver consistency you have never seen before, and stability which goes unmatched. When the motors arrive to you, if you would take a look there are Curved Magnets that have a great fit around the edge of each motor, the magnets a lot eliminate any airflow gaps within the motor which effectively increases efficiency
The DJI E800 motor is a replacement motor for the E800 Tuned Propulsion system. This is one of the best crafted motor we've ever seen. Proprietary single strand winding technology delivers unmatched consistency and stability. Look closer into the motor, there are Curved Magnets that fit flush around the edge of each motor, although much more difficult to produce, these magnets eliminate airflow gaps within the motor, greatly increasing efficiency.
If you would like to purchase the full E800 Kit then click here