I did this simple mod which I found on Youtube to greatly lighten the stick centering force by removing the huge mainspring. It's not for everyone, since this makes the stick very light. It still self-centers.....but barely. Fortunately it's fully reversible, no seals are broken AFAIK, and it virtually eliminates the annoying center detent that can make precise aiming so difficult when zoomed in to 30 POV.