Could you post a screen shot of how you have your stick and rudders scaled? Id be interested in giving it a shot, as I tend to spray a lot over correcting while shooting.
The scaling pattern that Wiley showed is the same one I use for my rudder scaling (although I use no damping -- see below). It is also good for elevator on the X52, as I had the same issues: the X52 felt very "tall and loose" and does flop around more than some others and makes centering more difficult.
With the "tighter" sticks I have used, like a CH or newer Logitech Xtreme 3D (a cheap but effective stick until it wears out), I recommend elevator scaling a little closer to default to keep the input a little more "linear", since stiffer sticks are easier to control and center.
As far as damping goes, remember that damping slows your input, it doesn't "scale" it. As you increase damping, you are effectively creating a delay between when you move the stick and when the game responds. This is why you don't want any scaling or damping on your X-axis (roll) because that just slows your roll rate. Unless you are really throwing your stick around too much and getting the "do not move your controls so rapidly" pop-up, my recommendation is to use little to NO damping -- the lowest possible setting you can get away with. Instead, rely on scaling for smoothness.
As far as rudder sway is concerned, when adjusting aim with your rudder ("shooting with your feet" as I call it), you will usually get some yaw sway back and forth when you release or recenter your rudder. When using rudder to aim, it is best to rudder into your shot,
hold there while you shoot and THEN release rudder. If you try to rudder into the shot and release it before or during firing, you will get the yaw wobble and your shot will spray left and right.
You can try practicing this and getting a feel for it by firing at the outer rings of the .target practice target. The .target will give you visual feedback via your bullet dispersion pattern and allow you to see if it varies most horizontally ("yaw sway") or vertically ("nose bounce").
My two cents...
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