Phil, I just want to comment on the post you made above: " ... <span style="font-size: small">maybe</span> they are all from the same factory ...".
<span style="font-size: medium">It is NOT a "maybe" Phil.
It is a DEFINITE. 100% DEFINITE.
</span><span style="font-size: small">We now know full well (and you do too, to be honest) that the Hyperion-Z, OK Hobby Infinite, Turnigy SK3 and Hacker motors are all made together at the Sunray Technology factory in Shenzhen, China.</span></p>

<span style="font-size: small"> -</span><span style="font-size: x-small">And not only are these motor brands </span>made at this Sunray factory. Many others are also made at this factory, including: Extreme Flight Torque, Shulman Aviation FURY, Gens Ace, Common-Sense-RC, LiPolice, Pelikan Foxy, Viper VA, Apache, Pilotage Nova-Line, MegaPower Taurus, Lipotech, Sonic Electric, BMI Models "Spitz" motors, Precision Aerobatics Thrust motors, Boost motors (from Pichler -sold by Robotbirds in UK), JP E-Pro motors; ELE motors (now discontinued) -there are probably more than this, we just don't know about them yet ..</p>

ALSO: We know that O.S. motors, and Futaba motors, are also made at this Sunray factory.</p>

In addition to this, we now know that Sunray also make the ESC's for most of the same brands that they make brushless motors for. -This a relatively new finding.
see: http://www.rcuniverse.com/forum/fb.asp?m=11452486 post #43 onwards.</p>

We know for certain that Sunray make the following ESC's: Hacker X-Pro; Hyperion Titan; Extreme Flight Airboss; Common-Sense-RC; Sonic Electric; Gens Ace; OK Hobby Infinite; Shulman Aviation FURY ESC's; Apache; LiPolice; Pilotage Nova-Line; BMI Spitz standard ESC's; BMI Spitz data log ESC's; HDX Brushless 35A ESC; JP E-PRO ESC's; and also: ELE-RC "Advance" ESC's (now discontinued); Watts-Up Hobbies AP 90A ESC (now discontinued);</p>

In addition, Sunray Tech also make Turnigy dlux ESC's., and Turnigy Trust ESC's.
They may also make Precision Aerobatics Quantum ESC's
It is also very likely indeed that Sunray make Jeti ADVANCE and Jeti SPIN ESC's; see http://www.rcuniverse.com/forum/fb.asp?m=11463027</p>

<span style="font-size: medium">So it is most certainly NOT a "maybe", Phil.
It is a 100% DEFINITE: That Hyperion-Z, OK Hobby Infinite, Turnigy SK3 and Hacker motors, and all the other brands, are made in the same factory -and that factory IS Sunray Technology.
</span></p>