you acyually have to setup some gyros  and hover in rate mode like the gy401 . i tried it and got this cold feeling all through my body knowing that little black box wasnt watching my back. anymore i just set centers as usual and run em up in hh and they seem to hold very well. my hats are off to all of the pilots that had to learn without gyro's and had to learn how to fly the tail. i think i aged a few years that afternoon when i tried it in rate.