You can try these numbers out and see if they work for you. I was going to give my old one to a new member and wanted to set the scaling up for him before I sent it. I never did because the twisty stick rudder had a problem I could not fix.
All twisty sticks need to have their rudder dead band turned up high enough so that when you are fighting the rudder does not activate unless you want it to. Many people unconsciously twist the stick while flying so if the sensitivity is set a little higher the chances of it activating without your knowledge will be lower since it take more pressure to actually activate it now.
Copy and paste the red numbers in your EXTREME3dPRO.JSM file located in the HTC/ACESHIGHll/SETTINGS folder on your hard drive.
Y Axis
0,32325,65535,0.034000,0.092000,0.050000
AXIS,PITCH,0,1
0.36,0.41,0.46,0.55,0.63,0.72,0.79,0.87,0.93,1.00
NOTUSED,NOTUSED,0,0
NOTUSED,NOTUSED,0,0
NOTUSED,NOTUSED,0,0
X Axis
0,33875,64660,0.131000,0.482000,0.050000
AXIS,ROLL,0,1
0.54,0.55,0.60,0.65,0.71,0.77,0.83,0.89,0.95,1.00