Not knowing a lot about LTO karting, I often wonder how someone can recommend a rear stagger without knowing the radius of the turn, or the width of the rear track, center to center, and if the race track has any banking. Seems to me those are all determining factors for calculating the correct amount of stagger you need for any given track.
I also wonder about rear tread widths. It seems to me, (and I can give you numerous examples of what it will do for a Sprint kart) that changing the tread widths can have a big affect on the handling of any kart. What I see is people recommending one tread width, almost like only one tread width will work, and then changing other things in an attempt to make that tread width the correct one to run.