Rudder endpoints set to 100%.
Delay = 0
Travel Limit Pot at 100%.
To figure out how far out to mount the control link ball, place it at a distance from center that allows the servo to travel at least +/- 45 degrees from neutral, without bottoming out the pitch slider at either end of its travel. Get as close as you can to the proper distance. Then use the Travel Limit pot to make sure the pitch slider is not coming up against a hard stop at either end of its travel.
In essence you want the Travel Limit setting as close as you can get to 100%, the servo to travel at least +/- 45 degrees from neutral, and you don't bind up the mechanics at full left or full right rudder.
Set the gain by flying in fast forward flight, increasing the gain until the tail of the heli begins to oscillate. Back off gain to the point where the fast oscillation stops.
Also, make sure the channel that you THINK is controlling the gyro gain is INDEED the channel that is doing so.
The DX8 will default to using channel 5 to control gyro gain and channel 7 to control a governor. This is the opposite of JR systems. If you're adjusting the wrong channel, then the gyro isn't really being controlled properly at all.
Rudder Endpoint settings -- if full rudder causes the heli to spin (yaw) at a rate too fast for your comfort, decrease the rudder endpoint setting from the initial setting of 100%. On the other hand, if full rudder doesn't make it spin fast enough for you, then increase the rudder endpoint numbers towards 150%.
You most likely will end up with different numbers for rudder travel endpoints, if you're trying to achieve equal left and right max yaw rates. With the 401, you most likely won't get equal left and right yaw rates, but can get close.
Make sure your gyro mounting tape is solid and sound, and not falling apart or coming unglued.
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