I gave all the parts to my buddy to try a seperate package, today he tried the arming of the tail, he had no problems. I gave him a walkera g006 gyro, a eflite 5 AMP esc, a electrifly 25 amp main esc. The only thing he screwed up was he had the pitch and alerion servos swapped on the receiver so it was pitching the wrong way on the back side of the swash. Now, when he powers the main esc(25 amp), the tail gyro initializes and then you move the rudder full left and then center. In your case, you may need to hold full left or right when powering up the heli, then go full opposite of that command, then back to arm it. But the sad part is, while playing with the helimax transmitter, I think I found what makes it glitch, the servo reverseing switches. Make a long story short, while playing with servo plugs and swaping servos I reversed the switches and everything was fine, well I switched it a few more times in the setup and low and behold, in normal position it did nothing with the stick moving, switch it bach and it would work fine. So here I am trying to find out why it will movw the servos in one position on the switch but nothing the other way. As I go to switch it from normal to reverse just lightly touching the switch with a allen key makes all the controls glitch. No matter how softly I touch the switch, the receiver glitches. I'm just guessing it's due to the cheap parts used in this heli to keep it under $200, RTF. Other than that, it works perfectly with a std HH gyro and a 5 amp esc on the tail and a 25 amp esc on the main.