Ok on the DX6 you have two options for the amount of servo movement or the amount of input you can do. You want what's call EXP and you can find it in the EXP menu it first comes up with EL0 if you are using the 401 and want to use EXP you need to change this setting to about 50% If you hit down on the first orange clicker thing it brings you to AI0 you need to set it up to 50% also. Now if you change the Elevator/Aileron D/R switchs from 0 to 1 you can also setup those postions too. Now the reason I said you need to set up the Elevator D/R / Aileron D/R 0 settings is because to use your 401 in AVCS it must be set in the 0 postion. I suggest that you set up 50% on both EL0/EL1 and AI0/AI1 this way you will hav EXP in both AVCS and Non AVCS while you are trimming your heli out. The D/R settings will limit how much your servos can rotate it's best to leave those alone. Also I'm not sure if you understand how to set up your 401 for your DX6 so here are the steps.

With the TX off hold both orange tabs up and turn the TX on
Tab up the first orange tab 4 times you will see GER now tab the second orange tab up until you see it say A. This stands for the Aileron D/R switch.

Ok now shut it off and then go back into the normal program mode.
Now understand that your Aileron D/R switch is what controls the Gyro...If it is on 0 then you are in AVCS mode and 1 is for non AVCS mode

Now to program the Gain for each mode go into the program mode and go to TRV ADJ click until you see it say GER
Now in the Aileron D/R switch is in postion 0 you are programming the Gain for AVCS if and you will see all your settings are + ?? %
Now is the Aileron D/R switch is in postion 1 you are programming the Gain for Non AVCS and you will see they are - ??%

This is why for EXP you need to program the EXP for both switch postions at 50% because you will be tuning the helicopter in Non AVCS mode to start with.

Also always remember before you plug your battery into your ESC to have the Aileron D/R set to 0 and then go to 1...Or you will get a Gyro error.

Also here is a biggy once you tune your helicopter up if for some reason you are using digital trim for your rudder make sure you re bind your helicopter (the shorting plug) If you don't and you have digital trim for your rudder it takes a bit for the RX to recieve this trim setting and sometimes the Gyro will align because you it took to long for it to talk....If for some reason you forget to bind your system here is what I do.

Let the gyro align then switch to Non AVCS...After the servo goes to trim switch the Aileron D/R back and forth from 1 to 0 a few times and stop on 0 and the AVCS will be correct.


Good luck.