I achieved my first quad hover yesterday (other than the self-hovering AR.Drone) so it was pretty exciting. The learning curve was challenging but my kind of fun! I did manage to bust 3 props while performing the dreaded "flips of death" before I got my gyro rotation figured out..

Here is some good setup information for prop direction, gyro rotation, and effect of transmitter stick control. It is an older article using the original KK board firmware, not the v4.7 that I have.

[link=http://www.rcexplorer.se/page14/kkguide/kkguide/quadx.html]KK-Quad X setup guide[/link]

On my new v4.7 firmware, I now realize that the functions of the pots has changed, the direction of max and min on the pots, and the motor positions of M1-M4. LOL! Once I got this information figured out, I finally got my gyro rotation corrected and the erector set was hovering in my backyard.

I'll post some photos and a video before moving on to my Turnigy H.A.L. [link=http://www.rcuniverse.com/forum/m_11184802/tm.htm]project[/link]. The newer KK2.0 board with the LCD screen at HK is superior to the older one I used on the ST450 Quad. The original KK gyro system has been updated to an more sensitive dual chip 3-axis gyro and single chip 3-axis accelerometer system making this the most stable KK board ever and allowing for the addition of an Auto-level function. A great deal of performance for only $30!

I would also recommend using this $11 Q450 "Flamewheel" [link=http://www.hobbyking.com/hobbyking/store/__24172__Q450_Glass_Fiber_Quadcopter_Frame_450mm.h tml]clone[/link] (first photo) because it weighs the same as the ST450 but costs much less and has much less hardware to fly off during flight. The solid nylon arms are perfect for a first quad project. I bought two of them and will swap my components over from the ST450 this Fall or Winter. If you don't have a power distribution board, there is also a version with Integrated PCB built-in for only [link=http://www.hobbyking.com/hobbyking/store/__24173__Q450_Glass_Fiber_Quadcopter_Frame_450mm_I ntegrated_PCB_Version.html]$18[/link]. (second photo)