I hooked up my telebee to my heli and in non heading hold I centered my linkage so my tail blades were centered, then I switched over to heading hold and the servo started to drift, I then used my sub trim to trim it out so when I switched back and forth from heading hold to non heading hold it stayed in one place. You have to inhibit all revo functions on the radio. I was really afraid my first flight but I took off in heading hold and it worked very well. Another thing you have to remember is to make sure you turn the transmitter on first then the receiver. you can go to www.hhiheli.com and there is a link there to show you the exact instructions you get when you buy the telebee.