T/Y Rob...I have read the specs from the Extreme guys in Australia...good news is inrunners have more thrust per watt...cooling is an issue and the arc motors are way too expensive to buy...if I were a pro I'd use one, but I don't get this stuff for free.

I saw the Velocity Cool 42 on Ebay

http://www.ebay.com/itm/Velocity-RC-...item1c1dff5fb4

for 89.99 and 9.50 shipping...was wondering about the electrical comparison, but I may be overthinking this...the Velocity is going into this fan....

http://www.hobbyking.com/hobbyking/s..._Fan_Unit.html