I know this thread has been inactive for a few months, but I wanted to add a comment. Based on what I read here, I purchased some Turnigy SK3 motors. They have been great. I used to have Hackers but I sold them in hard times. These SK3's are doing great! I've had several Hackers for different size planes. I will re-outfit them with SK3's. Thanks for a great service Dr. Motor.