You can eliminate most of that wobble by setting a soft lock. Here is a how to on that. It says the lowest setting is 670°, but I think it's actually closer to 860° on the DFGT. This setting has greatly increased my consistency and removed almost all the dead space at wheel neutral. I use ffb 10. There will still be some wobble going down a straight with no hands on the wheel, but it is greatly reduced. The sensitivity setting does nothing on wheels.