After I took this video, I tried adjusting it like you said too. I took the meter out, unplugged and plugged the wheel in. Measured with the wheel full lock left and right. One way the most I could get out of it was 23, the other way was like 19 something. After I did that I measured at the input and made sure it was at 0. After I did this, the wheel locked. I had centering and spring turned down to 12. Like you said, I couldnt feel much unless I ran into the wall or hit a car. I think Im going to try to hack the buttons like you did. What diodes do I use? I say the pinout that mark used, but Im lost lol.