While that may be your opinion KC, running higher gain than needed on a 401 will reduce the piro rate and reduce the life of the servo.
This comes directly from Futaba and their team rep Ben Minor.
http://www.futaba-rc.com/team/team-tip-002.html
In the old days, we ran as much gain as possible without having the tail "hunt" or "wag". Proper technique for greatest tail rotor servo life should be to run as much gain as needed for the most demanding maneuver and no more. This value may be well below the point of "hunting", but that is just fine.
Harry I'm not certain about that JR radio, but I can tell you that that the end points for the channel that the single wire is plugged into set the gain on the 401, the closer then end point to the center of travel the less gain. On some radios you can use the end points, on others you can use the gyro function in the software.