I have a Shadow-2 and was blown away at how great it was right out of the box. I had never had a gun before that I felt no need to mod anything, especially the trigger. Later, I got a Bull Shadow-2, and eventually I decided to have my Shadow-2's trigger done by CZ Custom so they would feel the same, and minimize any trigger-pull changes required when switching between the two guns. Long way of saying, get the trigger done, and that's it. I'm not sold on the bushing mod being significant.