<span style="font-size: medium">SUNRAY FACTORY SAMPLE 20-SIZE MOTOR -IS SAME AS HACKER, GENS ACE, etc etc
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1st pic shows a SunRay factory sample 2213motor (20 -size, stator size is 2213) -pic sent to me by SunRay factory.
2nd pic shows same Sunray 2213-size motor, with accessories.
3rd pic shows a Hacker A20 motor, with accessories.
4th pic shows some Hacker accessories for this A20 motor -the "Classic Back Mount Prop adapter set"
5th pic shows a Gens Ace 20-size motor.
6th pic shows a Gens Ace motor, with accessories.

It is very clear that the Hacker motor is almost identical to the SunRayfactory motor (only difference,slightly different style front housing).
The Gens Ace motor is also very similar, just with different style end housings.

Also, the accessories for each motor are almost identical -Sunray is same as Hacker is same as Gens Ace.

Adds further evidence ...