its hard to aim with the rudder flopping from side to side when you dont want it to ...
It doesn't flop from side to side. If when you set deadband to zero on your setup, you see this, you have major issues.
In my case, I use a powered USB hub for my joystick and pedals. Thus, I have stable and clean input signals from the hardware. However, due to the construction of the input devices (CH Products), there will often be a small positive or negative input. Deadband can be used to block these, but when using planes I prefer zero deadband for precise control. So long as I am using the input devices, these small deviations are drowned out by my deliberate inputs (bank, roll, slip, etc.). If I want to go hands-off the stick, I can use autopilot.
MH